JPH05286418A - Electrochromic mirror with defogging heater - Google Patents

Electrochromic mirror with defogging heater

Info

Publication number
JPH05286418A
JPH05286418A JP4095190A JP9519092A JPH05286418A JP H05286418 A JPH05286418 A JP H05286418A JP 4095190 A JP4095190 A JP 4095190A JP 9519092 A JP9519092 A JP 9519092A JP H05286418 A JPH05286418 A JP H05286418A
Authority
JP
Japan
Prior art keywords
protective plate
heater
glass base
base plate
electrochromic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4095190A
Other languages
Japanese (ja)
Inventor
Hideki Miyatake
秀樹 宮武
Yutaka Yoshida
豊 吉田
Koichi Ono
浩一 大野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokai Rika Co Ltd
Original Assignee
Tokai Rika 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 Tokai Rika Co Ltd filed Critical Tokai Rika Co Ltd
Priority to JP4095190A priority Critical patent/JPH05286418A/en
Publication of JPH05286418A publication Critical patent/JPH05286418A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To remove fogging on the surface of a glass base plate efficiently over a wide range by forming a protective plate of a metallic material in an electrochromic mirror composed of the glass base plate, an electrochromic layer on the reverse of the glass base plate, the protective plate on the reverse of it and a heater installed on the protective plate. CONSTITUTION:An electrically conductive transparent film 6 to form an electrochromic layer, an electrochromic film 3 and an electrically conductive reflecting film 7 are formed on the reverse of a glass base plate 1. The films 3, 6 and 7 are protected by means of a protective plate 2 adhered by means of sealing adhesive 4, on the one hand, a PTC heater 8 is installed on the reverse of the protective plate 2. Since a metallic material having coefficient of linear expansion approximately equal to that of the glass base plate 1, for example, titanium and so on is used in the protective plate 2, the heat conductivity is high. Thereby, even when a heater having a small heating element area is used, the protective plate 2 can be heated wholly in a short time, so that fogging on the surface of the glass base plate 1 can be removed efficiently.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、表面の曇りや水滴を除
去するためのヒータを備えたエレクトロクロミックミラ
ーに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrochromic mirror provided with a heater for removing surface fog and water drops.

【0002】[0002]

【従来の技術】従来の消曇用ヒータ付きエレクトロクロ
ミックミラーの構成を図3に示している。図において、
11は基板ガラスであり、その裏面に、透明導電膜1
6、エレクトロクロミック膜13、及び反射導電膜17
が順に形成されている。また、電極15a及び電極15b
が、それぞれ透明導電膜16及び反射導電膜17に接す
るように基板ガラス11に取り付けられ、各膜16,1
3,17が、封止用接着剤14により接着されたガラス
板12で保護されている。そして、この保護板としての
ガラス板12の裏面にヒータ18が装着され、基板ガラ
ス11の表面が曇った場合にヒータ18に通電して熱を
基板ガラス11に伝達することにより、曇りを除去する
ようにしている。
2. Description of the Related Art The structure of a conventional electrochromic mirror with a heater for defrosting is shown in FIG. In the figure,
Reference numeral 11 is a substrate glass, and the transparent conductive film 1 is provided on the back surface thereof.
6, electrochromic film 13, and reflective conductive film 17
Are formed in order. Also, the electrodes 15a and 15b
Are attached to the substrate glass 11 so as to be in contact with the transparent conductive film 16 and the reflective conductive film 17, respectively.
3, 17 are protected by the glass plate 12 adhered by the sealing adhesive 14. A heater 18 is attached to the back surface of the glass plate 12 as the protective plate, and when the surface of the substrate glass 11 is fogged, the heater 18 is energized to transfer heat to the substrate glass 11 to remove the fog. I am trying.

【0003】[0003]

【発明が解決しようとする課題】しかし、この構成で
は、熱伝導率の小さなガラス板12を介してヒータ18
の熱を基板ガラス11に伝えるため、基板ガラス11の
表面の昇温特性が悪くて除去に長い時間を要し、しかも
ヒータ18の発熱体が裏面に設けられていない基板ガラ
ス11の周縁の部分ではほとんど水滴を除去できないと
いう問題があった。
However, in this structure, the heater 18 is provided via the glass plate 12 having a small thermal conductivity.
Heat of the substrate glass 11 is transferred to the substrate glass 11, the temperature rising characteristic of the surface of the substrate glass 11 is poor and it takes a long time to remove the heat. Then, there was a problem that almost no water droplets could be removed.

【0004】特にヒータ18としてPTCヒータ(posi
tive temperature control heater:温度上昇により抵
抗値が大きくなって電流が流れにくくなる温度制御に用
いるヒータ)を用いる場合には、この問題が顕著であっ
た。つまり、PTCヒータでは、図4に示すように、銀
電極部分Bの断線とその電極部分の異常発熱を防止する
ためにヒータ全面積Aに対する発熱体の面積Cの割合を
小さく、具体的には60%程度とすることが多いので、
ミラーの全面積に対する発熱体面積の割合がかなり小さ
くなり、上述のように各部の熱伝導率の低さと相まっ
て、曇りを除去できない部分が多くなっていたのであ
る。
Particularly, as the heater 18, a PTC heater (posi
This problem was remarkable when a heater used for temperature control in which the resistance value increased due to the temperature rise and the current did not flow easily) was used. That is, in the PTC heater, as shown in FIG. 4, in order to prevent disconnection of the silver electrode portion B and abnormal heat generation of the electrode portion, the ratio of the area C of the heating element to the entire area A of the heater is small, and specifically, Since it is often around 60%,
The ratio of the area of the heating element to the total area of the mirror is considerably small, and as described above, the fogging cannot be removed in many areas due to the low thermal conductivity of each part.

【0005】したがって、本発明の解決すべき技術的課
題は、エレクトロクロミックミラーでのヒータによる曇
りの除去を、より速く、しかも広範囲で行えるようにす
ることである。
Therefore, a technical problem to be solved by the present invention is to make it possible to remove fogging by a heater in an electrochromic mirror more quickly and in a wider area.

【0006】[0006]

【課題を解決するための手段】上述の技術的課題を解決
するため、本発明に係る消曇用エレクトロクロミックミ
ラーは以下のように構成されている。すなわち、基板ガ
ラスと、この基板ガラスの裏面に形成されたエレクトロ
クロミック層と、エレクトロクロミック層の裏面に設け
られた保護板と、保護板に装着されたヒータとからなる
消曇用ヒータ付きエレクトロクロミックミラーであっ
て、保護板が金属材料により形成されたことを特徴とし
ている。
In order to solve the above technical problems, the electrochromic mirror for defrosting according to the present invention is constructed as follows. That is, a substrate glass, an electrochromic layer formed on the back surface of the substrate glass, a protective plate provided on the back surface of the electrochromic layer, and an electrochromic heater with a defrosting heater attached to the protective plate. The mirror is characterized in that the protective plate is made of a metal material.

【0007】[0007]

【作用・効果】上記構成においては、ヒータを作動させ
ると、その熱は、まず保護板に伝達される。この保護板
が金属材料により形成されていて、その熱伝導率が高い
ので、ヒータ全体に占める発熱体の面積が小さくても、
保護板は従来よりも短時間で全体的に加熱される。この
ようにして短時間で広範囲に広がった熱が基板ガラスに
伝達されるので、ガラス基板も、より短時間で広範囲に
加熱される。したがって、発熱体の面積が小さなヒータ
を使った場合でも、ガラス基板の表面の曇りを効率良く
除去することができる。
In the above structure, when the heater is operated, the heat is first transferred to the protective plate. Since this protective plate is made of a metal material and has high thermal conductivity, even if the area of the heating element occupying the entire heater is small,
The protective plate is entirely heated in a shorter time than before. In this way, the heat spread over a wide area in a short time is transferred to the glass substrate, so that the glass substrate is also heated over a wide area in a shorter time. Therefore, even when a heater having a small heating element area is used, it is possible to efficiently remove the fogging on the surface of the glass substrate.

【0008】なお、このように金属材料を保護板に用い
れば、ガラス板と比べて大幅に薄くしても同等以上の保
護効果を得ることができるから、その結果、熱伝達効率
をさらに高めるとともに、ミラーを全体として軽量化す
ることが可能となる。
By using the metal material for the protective plate as described above, the protective effect equal to or higher than that of the glass plate can be obtained even if it is much thinner than that of the glass plate. As a result, the heat transfer efficiency is further improved. It is possible to reduce the weight of the mirror as a whole.

【0009】[0009]

【実施例】以下に、図1及び図2に示した本発明の一実
施例に係る消曇用ヒータ付きエレクトロクロミックミラ
ーについて詳細に説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The electrochromic mirror with a heater for defrosting according to one embodiment of the present invention shown in FIGS. 1 and 2 will be described in detail below.

【0010】図1はこのエレクトロクロミックミラーの
構成を示す断面図である。図において、1は基板ガラス
であり、その裏面に、従来と同様、エレクトロクロミッ
ク層を構成する透明導電膜6、エレクトロクロミック膜
3、及び反射導電膜7が、イオンプレーティング等の方
法により順に形成されている。また、基板ガラス1に
は、電極5a及び電極5bが、それぞれ透明導電膜6及び
反射導電膜7に接するように取り付けられ、これらの膜
6,3,7が、封止用接着剤4により接着された保護板2
で保護されている。
FIG. 1 is a sectional view showing the structure of this electrochromic mirror. In the figure, 1 is a substrate glass, and a transparent conductive film 6, an electrochromic film 3, and a reflective conductive film 7 which form an electrochromic layer are sequentially formed on the back surface thereof by a method such as ion plating as in the conventional case. Has been done. Further, the electrode 5a and the electrode 5b are attached to the substrate glass 1 so as to be in contact with the transparent conductive film 6 and the reflective conductive film 7, respectively, and these films 6, 3 and 7 are bonded by the sealing adhesive 4. Protection plate 2
Protected by.

【0011】エレクトロクロミック膜は、その両側の電
極に電圧を印加して得られる可逆的な酸化・還元反応に
より着色・消色するように、通常、酸化イリジウム(Ir
Ox)や酸化ニッケル(NiO)などの酸化発色材、五酸化
タンタル(Ta25)などの固体電解質、及び三酸化タン
グステン(WO3)や三酸化モリブデン(MoO3)などの還
元発色剤から三層構造で構成される。本実施例では、ミ
ラーの表面が青色と無色とに変化を呈するように、エレ
クトロクロミック膜3をIrOx−Ta25−WO3の三層
構造とし、これを導電膜6,7で両側から挟む構成とし
た。そして、電極5a,5bと定電圧電源(1.3V)とを接続
した極性切り替えスイッチを操作して、IrOx側に+1.
3Vの電圧を印加すると着色し、WO3側に+1.3Vの電圧
を印加すると消色するように構成した。
The electrochromic film is usually made of iridium oxide (Ir oxide) so that it is colored / decolored by a reversible oxidation / reduction reaction obtained by applying a voltage to electrodes on both sides thereof.
Ox), nickel oxide (NiO) and other oxidative colorants, tantalum pentoxide (Ta 2 O 5 ) and other solid electrolytes, and tungsten trioxide (WO 3 ) and molybdenum trioxide (MoO 3 ) and other reducing colorants. It is composed of three layers. In this embodiment, as the surface of the mirror exhibits a change in the blue and colorless, the electrochromic film 3 is a three-layer structure of the IrOx-Ta 2 O 5 -WO 3 , which from both sides in the conductive film 6 and 7 It is configured to be sandwiched. Then, the polarity changeover switch connecting the electrodes 5a and 5b and the constant voltage power source (1.3V) is operated to bring the IrOx side to +1.
When the voltage of 3V is applied, it is colored, and when the voltage of + 1.3V is applied to the WO 3 side, it is erased.

【0012】一方、保護板2の裏面には、前述したのと
同様のPTCヒータ8が装着されている。保護板2は、
基板ガラス1とほぼ等しい線膨張係数を有するチタンを
材料として形成され、このことにより、加熱時にエレク
トロクロミック層に無理な力が加わるのを防止してい
る。また、基板ガラス1と線膨張係数の等しい金属材料
として、チタン以外にも、鉄−ニッケル−クロム合金や
鉄−ニッケル合金等を用いることができる。
On the other hand, the same PTC heater 8 as described above is mounted on the back surface of the protective plate 2. The protective plate 2 is
Titanium having a coefficient of linear expansion substantially equal to that of the substrate glass 1 is formed as a material, which prevents an unreasonable force from being applied to the electrochromic layer during heating. In addition to titanium, iron-nickel-chromium alloy, iron-nickel alloy, or the like can be used as the metal material having the same linear expansion coefficient as that of the substrate glass 1.

【0013】本実施例のエレクトロクロミックミラーの
表面が曇った場合、ヒータ8に通電することにより、従
来よりも効率良く曇りを除去できる。このことを、本実
施例のミラーと従来例に係るミラーの両方について行っ
た昇温特性の比較結果を示す図2のグラフを用いて説明
する。なお、この比較に用いた本実施例の保護板の熱伝
導率は4.1×10-2cal/cm・sec・℃であり、従来のガラス製
保護板の熱伝導率は1.9×10-3cal/cm・sec・℃であった。
When the surface of the electrochromic mirror of this embodiment is fogged, the heater 8 can be energized to remove the fog more efficiently than before. This will be described with reference to the graph of FIG. 2, which shows the comparison result of the temperature rising characteristics of both the mirror of this embodiment and the mirror of the conventional example. The thermal conductivity of the protective plate of this example used for this comparison was 4.1 × 10 −2 cal / cm · sec · ° C., and the thermal conductivity of the conventional glass protective plate was 1.9 × 10 −3 cal. / cm · sec · ° C.

【0014】グラフは、ガラス基板の表面の任意の点が
所定の温度に達するまでの時間の平均を表しており、実
線が本実施例を、破線が従来例を示している。図示する
ように、例えば本実施例においてミラーの表面が40℃
に達するまでの時間t1は、引例での時間t2に比べて約2
0%短縮されていた。また、図示はしていないが、ヒー
タに通電してから2分後のミラー面の温度分布は、従来
は40℃以上に達していた部分が全体の約60%である
のに対して、本実施例のミラーでは40℃以上の部分が
約80%と広がっていた。したがって、本実施例の構成
によれば、ヒータの発熱体のパターンに拘わらず、保護
板2の熱伝導率が高いために広い範囲のガラス面を短時
間で加熱できるので、曇りの除去も従来に比較して短時
間で広範囲に亙って行うことができ、その結果、良好な
後方視界を素早く得ることができる。
The graph shows the average of the time until an arbitrary point on the surface of the glass substrate reaches a predetermined temperature. The solid line shows the present embodiment and the broken line shows the conventional example. As shown in the figure, for example, the surface of the mirror is 40 ° C. in this embodiment.
The time t 1 required to reach is about 2 compared to the time t 2 in the reference.
It was reduced by 0%. Although not shown in the figure, the temperature distribution on the mirror surface 2 minutes after the heater is energized is about 60% of the total temperature that has reached 40 ° C or higher in the past, whereas In the mirror of the example, the portion at 40 ° C. or higher spreads to about 80%. Therefore, according to the configuration of the present embodiment, regardless of the pattern of the heating element of the heater, since the protective plate 2 has a high thermal conductivity, it is possible to heat a wide range of glass surfaces in a short time. Compared with the above, it can be performed over a wide range in a short time, and as a result, a good rear view can be quickly obtained.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明の一実施例に係る消曇用ヒータ付きエ
レクトロクロミックミラーの構成を示す断面図である。
FIG. 1 is a sectional view showing a configuration of an electrochromic mirror with a heater for defrosting according to an embodiment of the present invention.

【図2】 このミラーの表面の昇温特性を示すグラフで
ある。
FIG. 2 is a graph showing the temperature rise characteristics of the surface of this mirror.

【図3】 従来の消曇用ヒータ付きエレクトロクロミッ
クミラーの構成を示す断面図である。
FIG. 3 is a cross-sectional view showing a configuration of a conventional electrochromic mirror with a heater for defrosting.

【図4】 PTCヒータ全体に対して発熱体の占める割
合を示す図である。
FIG. 4 is a diagram showing a ratio of a heating element to the entire PTC heater.

【符号の説明】[Explanation of symbols]

1 基板ガラス 2 保護板 3 エレクトロクロミック膜 4 封止用
接着剤 5a,5b 電極 6 透明導
電膜 7 反射導電膜 8 ヒータ 9 電源
1 Substrate glass 2 Protective plate 3 Electrochromic film 4 Adhesive for sealing 5a, 5b Electrodes 6 Transparent conductive film 7 Reflective conductive film 8 Heater 9 Power supply

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 基板ガラス(1)と、該基板ガラス(1)の裏
面に形成されたエレクトロクロミック層(3,6,7)と、該
エレクトロクロミック層(3,6,7)の裏面に設けられた保
護板(2)と、該保護板(2)に装着されたヒータ(8)とから
なる消曇用ヒータ付きエレクトロクロミックミラーにお
いて、 上記保護板(2)が金属材料により形成されたことを特徴
とする消曇用ヒータ付きエレクトロクロミックミラー。
1. A substrate glass (1), an electrochromic layer (3,6,7) formed on the back surface of the substrate glass (1), and a back surface of the electrochromic layer (3,6,7). In an electrochromic mirror with a heater for defrosting, comprising a protective plate (2) provided and a heater (8) mounted on the protective plate (2), the protective plate (2) is formed of a metal material. An electrochromic mirror with a heater for anti-fog feature.
JP4095190A 1992-04-15 1992-04-15 Electrochromic mirror with defogging heater Pending JPH05286418A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4095190A JPH05286418A (en) 1992-04-15 1992-04-15 Electrochromic mirror with defogging heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4095190A JPH05286418A (en) 1992-04-15 1992-04-15 Electrochromic mirror with defogging heater

Publications (1)

Publication Number Publication Date
JPH05286418A true JPH05286418A (en) 1993-11-02

Family

ID=14130841

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4095190A Pending JPH05286418A (en) 1992-04-15 1992-04-15 Electrochromic mirror with defogging heater

Country Status (1)

Country Link
JP (1) JPH05286418A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737692A1 (en) * 1995-08-12 1997-02-14 Mekra Lang Gmbh & Co Kg AUTOMOTIVE EXTERIOR MIRROR STRUCTURE
CN110740909A (en) * 2017-06-13 2020-01-31 株式会社电装 Electromagnetic wave utilization system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737692A1 (en) * 1995-08-12 1997-02-14 Mekra Lang Gmbh & Co Kg AUTOMOTIVE EXTERIOR MIRROR STRUCTURE
CN110740909A (en) * 2017-06-13 2020-01-31 株式会社电装 Electromagnetic wave utilization system

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