JP2004182484A - Light controlling body and laminated glass equipped with the same - Google Patents

Light controlling body and laminated glass equipped with the same Download PDF

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Publication number
JP2004182484A
JP2004182484A JP2002348319A JP2002348319A JP2004182484A JP 2004182484 A JP2004182484 A JP 2004182484A JP 2002348319 A JP2002348319 A JP 2002348319A JP 2002348319 A JP2002348319 A JP 2002348319A JP 2004182484 A JP2004182484 A JP 2004182484A
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Japan
Prior art keywords
transparent conductive
pair
conductive films
light control
couple
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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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JP2002348319A
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Japanese (ja)
Inventor
Yuichi Yano
祐一 矢野
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Nippon Sheet Glass Co Ltd
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Nippon Sheet Glass Co Ltd
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Application filed by Nippon Sheet Glass Co Ltd filed Critical Nippon Sheet Glass Co Ltd
Priority to JP2002348319A priority Critical patent/JP2004182484A/en
Publication of JP2004182484A publication Critical patent/JP2004182484A/en
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  • Joining Of Glass To Other Materials (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light controlling body which can locally control the transmitted light quantity, and a laminated glass equipped with the light controlling body. <P>SOLUTION: A light controlling sheet 100 has a couple of PET films 101a, 101b, a couple of transparent conductive films 102a, 102b which are arranged on respective opposed faces of the couple of PET film 101a, 101b, a liquid crystal layer 103 interposed between the couple of transparent conductive films 102a, 102b, a couple of electrode terminal parts 105a, 105b which are provided at the lower ends of the couple of transparent conductive films 102a, 102b and each connected to a power source through a switch, and a couple of electrode terminal parts 105c, 105d which are provided at the upper ends of the couple of transparent conductive films 102a, 102b and connected to an conductive connection circuit 200 having a variable resistance 201. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、調光体、及び該調光体を備える合わせガラスに関する。
【0002】
【従来の技術】
通常、合わせガラスのうち、透過光量を調節するタイプのものは、1対の板ガラスの間に調光体を挟持している。この調光体は、PETフィルムからなる1対の基板と、該1対の基板の各対向面に夫々配設されたITO膜である1対の透明導電膜と、該1対の透明導電膜の間に介在する液晶層とを備える。
【0003】
上記液晶層は、電界の有無によって配向が変化する液晶分子を有し、1対の透明導電膜から液晶層へ付与された電界に起因する液晶分子の配向の変化を利用して調光体の透過光量、ひいては当該調光体を備える合わせガラスの透過光量を調節することができる。
【0004】
調光体の透明導電膜には、外部からこの透明導電膜へ電力を供給するための電極端子部が接続される。通常、調光体を備える合わせガラスの納まりにおいて、上記電極端子部へリード線等を介して電力を供給する外部電源の端子等は、納まりの見栄えを考慮して、当該合わせガラスの周縁部を保持するサッシの内部等に配設されるので、上記電極端子部は調光体の周縁部に配設される。
【0005】
【発明が解決しようとする課題】
しかしながら、上記電極端子部を介して透明導電膜に外部から電力を供給する際、透明導電膜の抵抗が非常に小さいため、透明導電膜における電位は当該透明導電膜内においてほぼ一定となり、その結果、調光体を備える合わせガラスの透過光量は当該合わせガラス内において一定となるため、合わせガラスの透過光量を局部的に変化させることができないという問題があった。
【0006】
本発明の目的は、透過光量を局部的に変化させることができる調光体、及び該調光体を備える合わせガラスを提供することにある。
【0007】
【課題を解決するための手段】
上記目的を達成するために、請求項1記載の調光体は、1対の基板と、該1対の基板の各対向面に夫々配設された1対の透明導電膜と、該1対の透明導電膜の間に介在する液晶層と、前記1対の透明導電膜に夫々接続された電極端子部の少なくとも2対とを備える調光体において、前記少なくとも2対における一方の対の電極端子部が電源との接続及び切断を切り替える切り替え手段に接続されると共に、他の対の電極端子部が前記1対の透明導電膜を互いに接続する導電性の接続手段を備えることを特徴とする。
【0008】
請求項1記載の調光体によれば、一方の対の電極端子部が電源との接続及び切断を切り替える切り替え手段に接続されると共に、他の対の電極端子部が1対の透明導電膜を互いに接続する導電性の接続手段を備えるので、透明導電膜から液晶層へ電界を付与する際に、透明導電膜における接続手段が接続された近傍の電位を変化させることができ、調光体の透過光量を局部的に変化させることができる。その結果、調光体を暈かすことができる。
【0009】
請求項2記載の調光体は、請求項1記載の調光体において、前記接続手段は可変抵抗を有することを特徴とする。
【0010】
請求項2記載の調光体によれば、接続手段は可変抵抗を有するので、透明導電膜において電位が変化する範囲を変更することができ、調光体において透過光量が変化する範囲を変更することができる。その結果、調光体を暈かす範囲を変更できる。
【0011】
請求項3記載の調光体は、請求項1又は2記載の調光体において、前記接続手段は蓄電部を有することを特徴とする。
【0012】
請求項3記載の調光体によれば、接続手段は蓄電部を有するので、透明導電膜への電力の供給を中断した後に、蓄電部に蓄電された電気を徐々に放電することによって透明導電膜における接続手段が接続された近傍の電位を徐変させることができ、調光体の透過光量を局部的に徐変させることができる。
【0013】
上記目的を達成するために、請求項4記載の合わせガラスは、請求項1乃至3のいずれか1項に記載の調光体と、該調光体を挟持する1対の板ガラスとを備えることを特徴とする。
【0014】
請求項4記載の合わせガラスによれば、請求項1乃至3のいずれか1項に記載の調光体を備えるので、合わせガラスの透過光量を局部的に変化させることができる。その結果、合わせガラスを暈かすことができる。
【0015】
【発明の実施の形態】
以下、本発明の実施の形態に係る調光シート100について図面を参照しながら説明する。
【0016】
図1は、本発明の実施の形態に係る調光シート100の断面図である。
【0017】
図1において、調光シート100(調光体)は、1対のPETフィルム101a,101b(基板)と、該1対のPETフィルム101a,101bの各対向面に夫々配設されたITO膜である1対の透明導電膜102a,102bと、該1対の透明導電膜102a,102bの間に介在する液晶層103とを備える。
【0018】
透明導電膜102aにおける液晶層103への対向面は、調光シート100の周縁部の一部において、液晶層103、透明導電膜102b及びPETフィルム101bが引き剥がされることによって露出しており、当該露出した対向面の上にリード線104を有する電極端子部105aが配設される。同様に、透明導電膜102bにおける液晶層103の対向面の上にも電極端子部105b(不図示)が配設される。1対の透明導電膜102a,102bには夫々、1対の電極端子部105a,105bを介して電源(不図示)から電力が供給され、1対の透明導電膜102a,102bの間に電界が発生する。この1対の電極端子部105a,105bは、電源及び1対の電極端子部105a,105bの接続、切断を切り替えるスイッチ(不図示)を介して電源に接続され、1対の電極端子部105a,105bに電源が接続されたときには、1対の透明導電膜102a,102bの間に電界が発生し、1対の電極端子部105a,105bが電源から切断されたときには、1対の透明導電膜102a,102bの間の電界が消滅する。
【0019】
また、液晶層103は、多数の空孔を有する透明なポリマーフィルム106から成り、当該空孔の各々は、ポリマーフィルム106の屈折率と同じ常光屈折率を有するネマチック液晶分子が充填されることによって液晶カプセル107を形成する。
【0020】
1対の透明導電膜102a,102bの間に電界が発生していないときは、各液晶カプセル107においてネマチック液晶分子が当該液晶カプセル107の内壁に沿って整列するため、ネマチック液晶分子は1対の透明導電膜102a,102bに対して垂直な方向に関し一様に整列せず、様々な方向に指向する。
【0021】
このように、複屈折性を呈するネマチック液晶分子が様々な方向に指向すること及びポリマーフィルム106内において液晶カプセル107の界面が存在することにより、PETフィルム101及び透明導電膜102を透過した光は散乱されるので、調光シート100は不透明となる。
【0022】
一方、1対の透明導電膜102a,102bの間に電界が発生したときは、各液晶カプセル107においてネマチック液晶分子は電界の方向と平行に整列する。また、調光シート100においてネマチック液晶分子の常光屈折率とポリマーフィルム106の屈折率は同じであるので、このときポリマーフィルム106内において光学的に液晶カプセル107の界面が存在しない状態と見なすことができ、PETフィルム101及び透明導電膜102を透過した光は散乱されることがなく、調光シート100は透明となる。
【0023】
図2は、図1の調光シート100の概略構成を示す分解斜視図である。
【0024】
図2において、PETフィルム101b、透明導電膜102b及び液晶層103の下端に切り欠き部が設けられ、これらの切り欠き部は互いに連通する。透明導電膜102aの面上において上記連通する切り欠き部に対応する箇所に電極端子部105aが配設される。また、PETフィルム101a、透明導電膜102a及び液晶層103の下端にも同様に切り欠き部が設けられ、透明導電膜102bの面上において当該切り欠き部に対応する箇所にも電極端子部105b(不図示)が配設される。
【0025】
また、透明導電膜102aの上端に電極端子部105cが設けられ、透明導電膜102bの上端に電極端子部105dが設けられる。電極端子部105c及び105dは可変抵抗201を有する導電性の接続回路200(接続手段)によって接続される。
【0026】
1対の透明導電膜102a,102bの各々に電力が供給され、該1対の透明導電膜102a,102bの間に電界が発生したときは、原則として調光シート100は透明となるが、透明導電膜102aにおける上端近傍の電位と透明導電膜102bにおける上端近傍の電位との差(以下「透明導電膜における上端近傍の電位差」という。)は、上記接続回路200に起因する短絡によって小さくなるので、1対の透明導電膜102a,102bの上端近傍の間に発生する電界(以下「透明導電膜における上端近傍の電界」という。)は弱くなり、その結果、調光シート100の上部は不透明の状態が維持される。また、上記電界は1対の透明導電膜102a,102bの上端から遠ざかるにつれて強くなるので、調光シート100における不透明部分と透明部分との境界は暈かされる。
【0027】
可変抵抗201の抵抗を大きくするときは、透明導電膜における上端近傍の電位差が小さい範囲が縮小されるので、透明導電膜における上端近傍の電界が弱い範囲も縮小し、一方、可変抵抗201の抵抗を小さくするときは、透明導電膜における上端近傍の電位差が小さい範囲が拡大されるので、透明導電膜における上端近傍の電界が弱い範囲も拡大する。その結果、可変抵抗201の抵抗を変更することによって調光シート100における不透明部分の範囲は変更される。
【0028】
図3は、図1の調光シート100における不透明部分の範囲の変化の様子を示す図である。
【0029】
1対の透明導電膜102a,102bの間に電界が発生していないときは、調光シート100における不透明部分は全面に及ぶ(図3(a))。また、1対の透明導電膜102a,102bの間に電界が発生したときであって、可変抵抗201の抵抗が小さいときは、不透明部分は調光シート100の上部の広範囲を占め(図3(b))、1対の透明導電膜102a,102bの間に電界が発生したときであって、可変抵抗201の抵抗が大きいときは、不透明部分は調光シート100の上部におけるごく一部の範囲を占める(図3(c))。
【0030】
一方、調光シート100において接続回路200が配置されていなければ、1対の透明導電膜102a,102bの間に電界が発生したときは、調光シート100における不透明部分は存在しない(図3(d))。
【0031】
1対の透明導電膜102a,102bの間に電界が発生したときは、可変抵抗201の抵抗の大小に関わらず、調光シート100における不透明部分と透明部分との境界は暈かされる。尚、現実の不透明部分は白色を呈するが、理解の容易さのため図において不透明部分は黒色をもって表現される。
【0032】
本実施の形態に係る調光シート100によれば、透明導電膜102a,102bの各々の上端に設けられた電極端子部105c,105dが、互いに導電性の接続回路200によって接続されるので、1対の透明導電膜102a,102bの間に電界が発生したとき、透明導電膜における上端近傍の電位差は小さくなり、もって透明導電膜における上端近傍の電界は弱くなるため、調光シート100の上部は不透明の状態が維持される。その結果、調光シート100の透過光量を局部的に変化させることができ、調光シート100を暈かすことができる。
【0033】
また、調光シート100によれば、接続回路200は可変抵抗201を有するので、透明導電膜における上端近傍の電位差が小さい範囲を変更することができ、透明導電膜における上端近傍の電界が弱い範囲を変更することができる。その結果、調光シート100を暈かす範囲を変更できる。
【0034】
接続回路200は、コンデンサ等の蓄電部を有してもよい。これにより、1対の透明導電膜102a,102bへの電力の供給を中断した後に、蓄電部に蓄電された電気を徐々に放電することによって透明導電膜における上端近傍の電位差を徐変させることができ、その結果、調光シート100の透過光量を局部的に徐変させることができる。
【0035】
上述した調光シート100では、電極端子部105c,105dが透明導電膜102a,102bの各々の上端に設けられたが、透明導電膜102a,102bの周縁部であれば、如何なる箇所に配置してもよく、これにより、調光シート100の透過光量を変化させる部分を任意に変更できる。
【0036】
接続回路200は導電性であれば、如何なる材料を用いてもよく、蓄電部は電力を蓄電可能なものであれば、如何なるものを用いてもよい。
【0037】
また、本実施の形態に係る調光シート100と、調光シート100を挟持する1対の板ガラスを備える合わせガラスは、調光シート100を備えるので、合わせガラスの透過光量を局部的に変化させることができる。その結果、当該合わせガラスを暈かすことができる。
【0038】
【発明の効果】
以上、詳細に説明したように、請求項1記載の調光体によれば、一方の対の電極端子部が電源との接続及び切断を切り替える切り替え手段に接続されると共に、他の対の電極端子部が1対の透明導電膜を互いに接続する導電性の接続手段を備えるので、透明導電膜から液晶層へ電界を付与する際に、透明導電膜における接続手段が接続された近傍の電位を変化させることができ、調光体の透過光量を局部的に変化させることができる。その結果、調光体を暈かすことができる。
【0039】
請求項2記載の調光体によれば、接続手段は可変抵抗を有するので、透明導電膜において電位が変化する範囲を変更することができ、調光体において透過光量が変化する範囲を変更することができる。その結果、調光体を暈かす範囲を変更できる。
【0040】
請求項3記載の調光体によれば、接続手段は蓄電部を有するので、透明導電膜への電力の供給を中断した後に、蓄電部に蓄電された電気を徐々に放電することによって透明導電膜における接続手段が接続された近傍の電位を徐変させることができ、調光体の透過光量を局部的に徐変させることができる。
【0041】
請求項4記載の合わせガラスによれば、請求項1乃至3のいずれか1項に記載の調光体を備えるので、合わせガラスの透過光量を局部的に変化させることができる。その結果、合わせガラスを暈かすことができる。
【図面の簡単な説明】
【図1】本発明の実施の形態に係る調光シート100の断面図である。
【図2】図1の調光シート100の概略構成を示す分解斜視図である。
【図3】図1の調光シート100における不透明部分の範囲の変化の様子を示す図である。
【符号の説明】
100 調光シート
101 PETフィルム
102 透明導電膜
103 液晶層
104 リード線
105 電極端子部
200 接続回路
201 可変抵抗
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dimmer and a laminated glass provided with the dimmer.
[0002]
[Prior art]
Usually, among the laminated glasses, the type that adjusts the amount of transmitted light has a dimmer between a pair of plate glasses. The dimmer includes a pair of substrates made of a PET film, a pair of transparent conductive films each of which is an ITO film disposed on each of the opposing surfaces of the pair of substrates, and a pair of the transparent conductive films. And a liquid crystal layer interposed therebetween.
[0003]
The liquid crystal layer has liquid crystal molecules whose orientation changes depending on the presence or absence of an electric field. It is possible to adjust the amount of transmitted light, and thus the amount of transmitted light of the laminated glass provided with the dimmer.
[0004]
An electrode terminal portion for supplying electric power to the transparent conductive film from outside is connected to the transparent conductive film of the dimmer. Normally, in a laminated glass provided with a light control body, a terminal of an external power supply or the like that supplies power to the electrode terminal portion via a lead wire or the like takes the peripheral edge of the laminated glass into consideration in consideration of the appearance of the fitted. Since the electrode terminal portion is provided inside the holding sash or the like, the electrode terminal portion is provided on the periphery of the light control body.
[0005]
[Problems to be solved by the invention]
However, when power is supplied from the outside to the transparent conductive film through the electrode terminal portion, the potential of the transparent conductive film is substantially constant in the transparent conductive film because the resistance of the transparent conductive film is extremely small. In addition, since the transmitted light amount of the laminated glass including the light control body becomes constant in the laminated glass, there is a problem that the transmitted light amount of the laminated glass cannot be locally changed.
[0006]
An object of the present invention is to provide a dimmer capable of locally changing the amount of transmitted light, and a laminated glass including the dimmer.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the light modulating body according to claim 1 includes a pair of substrates, a pair of transparent conductive films respectively disposed on respective opposing surfaces of the pair of substrates, and the pair of transparent conductive films. And a liquid crystal layer interposed between the transparent conductive films, and at least two pairs of electrode terminals connected to the pair of transparent conductive films, respectively, in one of the at least two pairs of electrodes. The terminal portion is connected to switching means for switching connection and disconnection to and from a power supply, and the other pair of electrode terminal portions includes conductive connection means for connecting the pair of transparent conductive films to each other. .
[0008]
According to the dimmer of the first aspect, one pair of the electrode terminal portions is connected to the switching means for switching between connection and disconnection with the power supply, and the other pair of the electrode terminal portions is a pair of the transparent conductive films. Are provided, and when applying an electric field from the transparent conductive film to the liquid crystal layer, the potential of the transparent conductive film in the vicinity of the connection of the connecting means can be changed. Can be locally changed. As a result, the dimmer can be blurred.
[0009]
According to a second aspect of the present invention, in the dimmer of the first aspect, the connection means has a variable resistor.
[0010]
According to the dimmer of the second aspect, since the connection means has a variable resistance, the range in which the potential changes in the transparent conductive film can be changed, and the range in which the amount of transmitted light changes in the dimmer is changed. be able to. As a result, the range in which the light control body is blurred can be changed.
[0011]
According to a third aspect of the present invention, in the dimmer according to the first or second aspect, the connection unit includes a power storage unit.
[0012]
According to the third aspect of the present invention, since the connection means has the power storage unit, the supply of the power to the transparent conductive film is interrupted, and then the electricity stored in the power storage unit is gradually discharged, so that the transparent conductive material is discharged. It is possible to gradually change the potential of the film in the vicinity of where the connection means is connected, and it is possible to locally gradually change the transmitted light amount of the light control body.
[0013]
In order to achieve the above object, a laminated glass according to claim 4 includes the dimmer according to any one of claims 1 to 3 and a pair of plate glasses sandwiching the dimmer. It is characterized by.
[0014]
According to the laminated glass according to the fourth aspect, since the dimmer according to any one of the first to third aspects is provided, the transmitted light amount of the laminated glass can be locally changed. As a result, the laminated glass can be blurred.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a light control sheet 100 according to an embodiment of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a cross-sectional view of the light control sheet 100 according to the embodiment of the present invention.
[0017]
In FIG. 1, a light control sheet 100 (light control body) includes a pair of PET films 101a and 101b (substrates) and an ITO film disposed on each of the opposing surfaces of the pair of PET films 101a and 101b. It includes a pair of transparent conductive films 102a and 102b and a liquid crystal layer 103 interposed between the pair of transparent conductive films 102a and 102b.
[0018]
The surface of the transparent conductive film 102a facing the liquid crystal layer 103 is exposed by peeling off the liquid crystal layer 103, the transparent conductive film 102b, and the PET film 101b at a part of the periphery of the light control sheet 100. An electrode terminal portion 105a having a lead wire 104 is provided on the exposed facing surface. Similarly, an electrode terminal portion 105b (not shown) is provided on the surface of the transparent conductive film 102b opposite to the liquid crystal layer 103. Electric power is supplied to the pair of transparent conductive films 102a and 102b from a power source (not shown) via the pair of electrode terminals 105a and 105b, respectively, and an electric field is generated between the pair of transparent conductive films 102a and 102b. appear. The pair of electrode terminal portions 105a and 105b are connected to a power source via a power supply and a switch (not shown) for switching connection and disconnection of the pair of electrode terminal portions 105a and 105b, and are connected to the pair of electrode terminal portions 105a and 105b. When a power supply is connected to 105b, an electric field is generated between the pair of transparent conductive films 102a and 102b, and when the pair of electrode terminals 105a and 105b is disconnected from the power supply, a pair of transparent conductive films 102a is formed. , 102b disappear.
[0019]
Further, the liquid crystal layer 103 is composed of a transparent polymer film 106 having a large number of holes, and each of the holes is filled with nematic liquid crystal molecules having the same ordinary refractive index as that of the polymer film 106. The liquid crystal capsule 107 is formed.
[0020]
When no electric field is generated between the pair of transparent conductive films 102a and 102b, the nematic liquid crystal molecules are aligned along the inner wall of the liquid crystal capsule 107 in each liquid crystal capsule 107, so that the nematic liquid crystal molecules are in a pair. They are not uniformly aligned in a direction perpendicular to the transparent conductive films 102a and 102b, but are directed in various directions.
[0021]
As described above, since the birefringent nematic liquid crystal molecules are oriented in various directions and the interface of the liquid crystal capsule 107 exists in the polymer film 106, light transmitted through the PET film 101 and the transparent conductive film 102 is The light control sheet 100 becomes opaque because it is scattered.
[0022]
On the other hand, when an electric field is generated between the pair of transparent conductive films 102a and 102b, the nematic liquid crystal molecules are aligned in each liquid crystal capsule 107 in parallel with the direction of the electric field. In addition, since the ordinary light refractive index of the nematic liquid crystal molecules and the refractive index of the polymer film 106 in the light control sheet 100 are the same, it may be regarded that the interface of the liquid crystal capsule 107 does not exist optically in the polymer film 106 at this time. The light transmitted through the PET film 101 and the transparent conductive film 102 is not scattered, and the light control sheet 100 is transparent.
[0023]
FIG. 2 is an exploded perspective view showing a schematic configuration of the light control sheet 100 of FIG.
[0024]
In FIG. 2, cutouts are provided at the lower ends of the PET film 101b, the transparent conductive film 102b, and the liquid crystal layer 103, and these cutouts communicate with each other. On the surface of the transparent conductive film 102a, an electrode terminal portion 105a is provided at a location corresponding to the communicating cutout portion. Similarly, cutouts are provided at the lower ends of the PET film 101a, the transparent conductive film 102a, and the liquid crystal layer 103, and the electrode terminal portions 105b ( (Not shown).
[0025]
Further, an electrode terminal portion 105c is provided on an upper end of the transparent conductive film 102a, and an electrode terminal portion 105d is provided on an upper end of the transparent conductive film 102b. The electrode terminal portions 105c and 105d are connected by a conductive connection circuit 200 (connection means) having a variable resistor 201.
[0026]
When power is supplied to each of the pair of transparent conductive films 102a and 102b and an electric field is generated between the pair of transparent conductive films 102a and 102b, the light control sheet 100 becomes transparent in principle. The difference between the potential near the upper end of the conductive film 102a and the potential near the upper end of the transparent conductive film 102b (hereinafter, referred to as the “potential difference near the upper end of the transparent conductive film”) becomes small due to the short circuit caused by the connection circuit 200. The electric field generated between the vicinity of the upper ends of the pair of transparent conductive films 102a and 102b (hereinafter referred to as “the electric field near the upper end of the transparent conductive film”) is weakened. As a result, the upper part of the light control sheet 100 is opaque. The state is maintained. Further, since the electric field becomes stronger as the distance from the upper ends of the pair of transparent conductive films 102a and 102b increases, the boundary between the opaque portion and the transparent portion in the light control sheet 100 is blurred.
[0027]
When increasing the resistance of the variable resistor 201, the range where the potential difference near the upper end of the transparent conductive film is small is reduced, so that the range where the electric field near the upper end of the transparent conductive film is weak is also reduced. Is reduced, the range in which the potential difference near the upper end of the transparent conductive film is small is expanded, so that the range in which the electric field near the upper end of the transparent conductive film is weak is also expanded. As a result, by changing the resistance of the variable resistor 201, the range of the opaque portion in the light control sheet 100 is changed.
[0028]
FIG. 3 is a diagram showing how the range of the opaque portion in the light control sheet 100 of FIG. 1 changes.
[0029]
When no electric field is generated between the pair of transparent conductive films 102a and 102b, the opaque portion of the light control sheet 100 covers the entire surface (FIG. 3A). Also, when an electric field is generated between the pair of transparent conductive films 102a and 102b and the resistance of the variable resistor 201 is small, the opaque portion occupies a wide area in the upper part of the light control sheet 100 (see FIG. b)) When an electric field is generated between the pair of transparent conductive films 102a and 102b and the resistance of the variable resistor 201 is large, the opaque portion is only a part of the area above the light control sheet 100. (FIG. 3C).
[0030]
On the other hand, if the connection circuit 200 is not provided in the light control sheet 100, when an electric field is generated between the pair of transparent conductive films 102a and 102b, there is no opaque portion in the light control sheet 100 (FIG. d)).
[0031]
When an electric field is generated between the pair of transparent conductive films 102a and 102b, the boundary between the opaque part and the transparent part in the light control sheet 100 is blurred regardless of the magnitude of the resistance of the variable resistor 201. Although the actual opaque portion is white, the opaque portion is represented in black in the figure for easy understanding.
[0032]
According to the light control sheet 100 according to the present embodiment, the electrode terminals 105c and 105d provided at the upper ends of the transparent conductive films 102a and 102b are connected to each other by the conductive connection circuit 200. When an electric field is generated between the pair of transparent conductive films 102a and 102b, the potential difference near the upper end of the transparent conductive film becomes smaller, and the electric field near the upper end of the transparent conductive film becomes weaker. An opaque state is maintained. As a result, the transmitted light amount of the light control sheet 100 can be locally changed, and the light control sheet 100 can be blurred.
[0033]
Further, according to the light control sheet 100, since the connection circuit 200 has the variable resistor 201, the range where the potential difference near the upper end of the transparent conductive film is small can be changed, and the electric field near the upper end of the transparent conductive film is weak. Can be changed. As a result, the range in which the light control sheet 100 is blurred can be changed.
[0034]
The connection circuit 200 may include a power storage unit such as a capacitor. Thus, after the supply of power to the pair of transparent conductive films 102a and 102b is interrupted, the potential difference near the upper end of the transparent conductive film is gradually changed by gradually discharging the electricity stored in the power storage unit. As a result, the transmitted light amount of the light control sheet 100 can be gradually changed locally.
[0035]
In the light control sheet 100 described above, the electrode terminal portions 105c and 105d are provided at the upper ends of the transparent conductive films 102a and 102b, but may be arranged at any positions as long as they are the peripheral portions of the transparent conductive films 102a and 102b. Thus, the portion that changes the amount of transmitted light of the light control sheet 100 can be arbitrarily changed.
[0036]
The connection circuit 200 may be made of any material as long as it is conductive, and the power storage unit may be made of any material as long as it can store power.
[0037]
Further, since the laminated glass including the light control sheet 100 according to the present embodiment and the pair of plate glasses sandwiching the light control sheet 100 includes the light control sheet 100, the transmitted light amount of the laminated glass is locally changed. be able to. As a result, the laminated glass can be blurred.
[0038]
【The invention's effect】
As described above in detail, according to the dimmer according to claim 1, one pair of electrode terminal portions is connected to the switching means for switching between connection and disconnection with the power source, and the other pair of electrode terminals is connected. Since the terminal portion has conductive connecting means for connecting the pair of transparent conductive films to each other, when applying an electric field from the transparent conductive film to the liquid crystal layer, the potential in the transparent conductive film near the connection of the connecting means is reduced. The amount of light transmitted through the dimmer can be changed locally. As a result, the dimmer can be blurred.
[0039]
According to the light control body of claim 2, since the connection means has a variable resistance, the range in which the potential changes in the transparent conductive film can be changed, and the range in which the amount of transmitted light changes in the light control body is changed. be able to. As a result, the range in which the light control body is blurred can be changed.
[0040]
According to the third aspect of the present invention, since the connection means has the power storage unit, the supply of the power to the transparent conductive film is interrupted, and then the electricity stored in the power storage unit is gradually discharged, whereby the transparent conductive material is discharged. It is possible to gradually change the potential of the film in the vicinity of where the connection means is connected, and it is possible to locally gradually change the transmitted light amount of the light control body.
[0041]
According to the laminated glass according to the fourth aspect, since the dimming body according to any one of the first to third aspects is provided, the transmitted light amount of the laminated glass can be locally changed. As a result, the laminated glass can be blurred.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a light control sheet 100 according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing a schematic configuration of the light control sheet 100 of FIG.
FIG. 3 is a diagram showing how the range of an opaque portion in the light control sheet 100 of FIG. 1 changes.
[Explanation of symbols]
REFERENCE SIGNS LIST 100 light control sheet 101 PET film 102 transparent conductive film 103 liquid crystal layer 104 lead wire 105 electrode terminal 200 connection circuit 201 variable resistance

Claims (4)

1対の基板と、該1対の基板の各対向面に夫々配設された1対の透明導電膜と、該1対の透明導電膜の間に介在する液晶層と、前記1対の透明導電膜に夫々接続された電極端子部の少なくとも2対とを備える調光体において、
前記少なくとも2対における一方の対の電極端子部が電源との接続及び切断を切り替える切り替え手段に接続されると共に、他の対の電極端子部が前記1対の透明導電膜を互いに接続する導電性の接続手段を備えることを特徴とする調光体。
A pair of substrates, a pair of transparent conductive films respectively disposed on the opposing surfaces of the pair of substrates, a liquid crystal layer interposed between the pair of transparent conductive films, and the pair of transparent conductive films. A dimmer comprising at least two pairs of electrode terminal portions respectively connected to the conductive film,
One of the at least two pairs of electrode terminals is connected to switching means for switching between connection and disconnection to and from a power source, and the other pair of electrode terminals connects the pair of transparent conductive films to each other. A light control body, comprising:
前記接続手段は可変抵抗を有することを特徴とする請求項1記載の調光体。2. The dimmer according to claim 1, wherein the connection unit has a variable resistor. 前記接続手段は蓄電部を有することを特徴とする請求項1又は2記載の調光体。The dimmer according to claim 1, wherein the connection unit has a power storage unit. 請求項1乃至3のいずれか1項に記載の調光体と、該調光体を挟持する1対の板ガラスとを備えることを特徴とする合わせガラス。A laminated glass comprising: the light control body according to any one of claims 1 to 3; and a pair of plate glasses sandwiching the light control body.
JP2002348319A 2002-11-29 2002-11-29 Light controlling body and laminated glass equipped with the same Pending JP2004182484A (en)

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