JPS6193430A - Liquid crystal type dazzling preventive mirror - Google Patents
Liquid crystal type dazzling preventive mirrorInfo
- Publication number
- JPS6193430A JPS6193430A JP59214628A JP21462884A JPS6193430A JP S6193430 A JPS6193430 A JP S6193430A JP 59214628 A JP59214628 A JP 59214628A JP 21462884 A JP21462884 A JP 21462884A JP S6193430 A JPS6193430 A JP S6193430A
- Authority
- JP
- Japan
- Prior art keywords
- film
- liquid crystal
- transparent electrode
- silicon nitride
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
く技術分野〉
本発明は、自動車等に於けるミラー等に使用される液晶
を用いた防眩ミラー（液晶型防眩ミラー）に係るもので
あり、特ζゲスト・ホスト型液晶を用いた液晶型防眩ミ
ラーの改良に関するものである０
〈従来技術〉
ゲスト・ホスト型液晶使用の液晶型防眩ミラーは従来よ
り提案されているが、従来のゲスト・ホスト型液晶使用
の防眩ミラーには、干渉模様が発生するという問題点が
あった。フこの干渉模様は、太陽光のように広い波長域
の光源のもとでは余り見えないが、トンネル内や高速道
路のナトリウム・ランプ、或いは高速道路の水銀ランプ
、さらには自動車のハロゲン・ランプ等の単色光源のも
とでは顕著に現われる。[Detailed Description of the Invention] Technical Field The present invention relates to an anti-glare mirror using liquid crystal (liquid crystal anti-glare mirror) used for mirrors in automobiles, etc. Related to improvement of liquid crystal type anti-glare mirror using host type liquid crystal0 <Prior art> Liquid crystal type anti-glare mirror using guest-host type liquid crystal has been proposed in the past, but conventional guest-host type liquid crystal The anti-glare mirror used had the problem of generating interference patterns. This interference pattern is not very visible under light sources with a wide wavelength range such as sunlight, but it can be seen in sodium lamps in tunnels and on highways, mercury lamps on highways, and even halogen lamps in cars. It appears conspicuously under a monochromatic light source.
〈発明の目的〉
本発明は上記の問題点を解決することができる液晶型防
眩ミラー構造の提供を目的とするものであり、反射層を
セルの裏側に設けると共に、前面透明電極基板、背面透
明電極基板の透明電極（ＩＴＯ膜）とポリイミド配向膜
との間に窒化シリコン絶縁膜を形成する構造とすること
により、上記干渉模様の発生を防止した液晶型防眩ミラ
ーを提供するものである。<Object of the Invention> The present invention aims to provide a liquid crystal type anti-glare mirror structure capable of solving the above problems, in which a reflective layer is provided on the back side of the cell, and a front transparent electrode substrate, a back side The present invention provides a liquid crystal type anti-glare mirror that prevents the occurrence of the above interference pattern by having a structure in which a silicon nitride insulating film is formed between the transparent electrode (ITO film) of the transparent electrode substrate and the polyimide alignment film. .
発明の構成〉
本発明の液晶型防眩ミラーは、ゲスト・ホスト型液晶を
用いた液晶防眩ミラーに於いて、基板上に、ＩＴＯ膜か
ら成る透明電極、窒化シリコン絶縁膜及びポリイミド配
向膜を、この順に形成した構造を有する透明電極基板を
、上記液晶をはさむ２枚の電極基板として用いると共に
、背面透明電極基板の背後に反射層を設けたことを特徴
とするものである。Structure of the Invention The liquid crystal anti-glare mirror of the present invention is a liquid crystal anti-glare mirror using a guest-host type liquid crystal, in which a transparent electrode made of an ITO film, a silicon nitride insulating film, and a polyimide alignment film are provided on a substrate. The present invention is characterized in that transparent electrode substrates having a structure formed in this order are used as two electrode substrates sandwiching the liquid crystal, and a reflective layer is provided behind the back transparent electrode substrate.
〈実施例〉
以下、実施例に基づいて本発明の詳細な説明する０
図は、本発明に係る液晶型防眩ミラーの構成を示す一部
断面図である。<Example> Hereinafter, the present invention will be described in detail based on Examples. FIG. 1 is a partial cross-sectional view showing the structure of a liquid crystal type anti-glare mirror according to the present invention.
図に於いて、夏は前面透明電極基板であり、基板１１（
累ガラスまたはパッシベーション膜をコートしたガラス
）上に、透明電極（ＩＴＯ膜）１２、窒化シリコン絶縁
膜１３及びポリイミド配向膜１４を、この順に形成した
構造を有する〇一方、２は背面、透明電極基板であり、
上記前面透明電極基板債−ｖこ、基板２１（素ガラスま
たはパッシベーション膜をコートしたガラス）上に、透
明電極（ＩＴＯ膜）２２、窒化シリコン絶縁膜２３及び
ポリイミド配向膜２４を、この順に形成した構造を有す
る。３は、上記両透明電極基板間に封入されたゲスト・
ホスト型液晶（相転移型）である。そして、４は、背面
透明電極基板の背面に形成された反射層（例えば、銀引
き裏打ち膜、Ａｔ蒸着膜−５ｉＯ３蒸着膜−裏打ち樹脂
層など）である。In the figure, summer is the front transparent electrode substrate, and the substrate 11 (
It has a structure in which a transparent electrode (ITO film) 12, a silicon nitride insulating film 13, and a polyimide alignment film 14 are formed in this order on a laminated glass or glass coated with a passivation film. It is a substrate,
A transparent electrode (ITO film) 22, a silicon nitride insulating film 23, and a polyimide alignment film 24 were formed in this order on the substrate 21 (plain glass or glass coated with a passivation film). Has a structure. 3 is a guest sealed between both transparent electrode substrates.
It is a host type liquid crystal (phase transition type). 4 is a reflective layer formed on the back surface of the back transparent electrode substrate (for example, a silver-plated backing film, At vapor deposition film-5iO3 vapor deposition film-backing resin layer, etc.).
上記の構造を有する本発明に係る液晶型防眩ミラーに於
ける、干渉模様の発生程度及び反射率を下記の表に示す
。なお、比較例として、透明電極（ＩＴＯ膜）上に直接
ポリイミド配向膜を形成した構造を有する透明電極基板
を用いて構成した液晶型防眩ミラー（比較例１）及び透
明電極（ＩＴＯ膜）とポリイミド配向膜との間にＳｉＯ
３絶縁膜を設けた構造を有する透明電極基板を用いて構
成した液晶型防眩ミラー（比較例２）を選び、これらに
於ける干渉模様の発生程度及び反射率も併せて示してい
る０
（注１） 基板上の膜構成
０実施例１
ポリイミド配向膜（７００Ａ）
Ｏ実施例２
ポリイミド配向膜（７００Ａ）
Ｏ実施例８
ポリイミド配向膜（７００Ａ）
Ｏ比較例Ｉ
ＩＴＯ膜（２０ＯＡ）−ポリイミド配向膜（ＩｌｏｏＡ
）
Ｏ比鮫碗紹
ＩＴＯ膜（２００λ） ５ｉ０２膜（５００λ）−ポ
リイミド配向膜（７００Ａ）
（注２） 反射率
ＴＯＦＦ’オフ時の反射率〔％〕
ＴＯＮ ’オフ時の反射率〔％〕
上記の表に示す結果から明らかなように、本発明の構成
とすることにより、従来問題となっていた干渉模様が殆
ど発生しない液晶型防眩ミラーを得ることができるもの
である。すなわち、前面透明電極基板に於けるセル内側
での反射光と、背面透明電極基板に於けるセル内側での
反射光の干渉が、ＩＴＯ膜／窒化シリコン膜／ポリイミ
ド配向膜の組合せで膜厚を適度にすることで著しく減少
するものである。The table below shows the degree of occurrence of interference patterns and the reflectance in the liquid crystal type anti-glare mirror according to the present invention having the above structure. As a comparative example, a liquid crystal type anti-glare mirror (Comparative Example 1) constructed using a transparent electrode substrate having a structure in which a polyimide alignment film was directly formed on a transparent electrode (ITO film) and a transparent electrode (ITO film) were used. SiO between polyimide alignment film
A liquid crystal anti-glare mirror (Comparative Example 2) constructed using a transparent electrode substrate having a structure provided with an insulating film was selected, and the degree of interference pattern occurrence and reflectance in these mirrors are also shown. Note 1) Film configuration on substrate 0 Example 1 Polyimide alignment film (700A) O Example 2 Polyimide alignment film (700A) O Example 8 Polyimide alignment film (700A) O Comparative example I ITO film (20OA) - Polyimide alignment Membrane (IlooA
) ITO film (200λ) 5i02 film (500λ) - Polyimide alignment film (700A) (Note 2) Reflectance TOFF' Reflectance when off [%] TON' Reflectance when off [%] Above As is clear from the results shown in the table, by adopting the configuration of the present invention, it is possible to obtain a liquid crystal type anti-glare mirror in which almost no interference pattern, which has been a problem in the past, occurs. In other words, the interference between the light reflected inside the cell on the front transparent electrode substrate and the light reflected inside the cell on the back transparent electrode substrate causes the film thickness to increase due to the combination of ITO film/silicon nitride film/polyimide alignment film. It can be significantly reduced by controlling it in moderation.
また、透明電極基板での反射光を減少させることで、オ
ン時とオフ時の反射率の差を大きくすることができるも
のである。Furthermore, by reducing the reflected light on the transparent electrode substrate, it is possible to increase the difference in reflectance between on and off times.
さらに、透明電極（ＩＴＯ膜）とポリイミド配向膜との
間に窒化シリコン膜を介在させることにより上下す！＝
、りを有効に防止することができるという効果も奏する
ものである。Furthermore, by interposing a silicon nitride film between the transparent electrode (ITO film) and the polyimide alignment film, it can be moved vertically! =
It also has the effect of being able to effectively prevent damage.
なお、背面側の基板２１は、二重像防止のために、でき
るだけ薄くすることが望ましい。Note that it is desirable that the substrate 21 on the back side be made as thin as possible to prevent double images.
また、上記各実施例に於いては、ＩＴＯ膜と窒化シリコ
ン膜の膜厚の和、及びポリイミド配向膜の膜厚を、それ
ぞれ７００Ａとしているが、これらは、それぞれ、５０
０〜ｌ００ＯＡ、５００〜ｌ１０ＯＡ程度とすることが
適当であろう。In each of the above embodiments, the sum of the thicknesses of the ITO film and the silicon nitride film and the thickness of the polyimide alignment film are each 700A, but these are each 50A.
It would be appropriate to set it to about 0 to 100 OA or 500 to 110 OA.
なお、前面透明電極基板と背面透明電極基板の何れか一
方の基板のみ、透明電極（ＩＴＯ膜）とポリイミド配向
膜との間に窒化シリコン膜を設ける構成としても干渉模
様の発生を抑えることができるであろう。Note that the generation of interference patterns can also be suppressed by providing a silicon nitride film between the transparent electrode (ITO film) and the polyimide alignment film on only one of the front transparent electrode substrate and the back transparent electrode substrate. Will.
〈発明の効果〉
以上説明したように、本発明によれば、上記従来の問題
点を解決することができ、干渉模様の発生しない、きわ
めて有用な液晶型防眩ミラーを得ることができるもので
ある。<Effects of the Invention> As explained above, according to the present invention, the above-mentioned conventional problems can be solved, and an extremely useful liquid crystal type anti-glare mirror that does not generate interference patterns can be obtained. be.
図は、神明に係る液晶型防眩ミラーの構成を示す一部断
面図である。
符号の説明
１：前面透明電極基板、１１：基板、１２：透明電極、
１３：窒化シリコン絶縁膜、１４：ポリイミド配向膜、
２：背面透明電極基板、２１：基板、２２：透明電極、
２３：窒化シリコン絶縁膜、２４：ポリイミド配向膜、
３ニゲスト・ホスト型液晶、４：反射層。
代理人 弁理士 福 士 愛 彦 （他２名）手続補正
書
昭和６０年１ 月 １日The figure is a partial cross-sectional view showing the structure of a liquid crystal type anti-glare mirror according to Shinmei. Explanation of symbols 1: Front transparent electrode substrate, 11: Substrate, 12: Transparent electrode,
13: silicon nitride insulating film, 14: polyimide alignment film,
2: Back transparent electrode substrate, 21: Substrate, 22: Transparent electrode,
23: silicon nitride insulating film, 24: polyimide alignment film,
3: Nigest-host type liquid crystal, 4: Reflective layer. Agent Patent attorney Aihiko Fukushi (and 2 others) Procedural amendment January 1, 1985
Claims (1)
於いて、 基板上に、ＩＴＯ膜から成る透明電極、窒化シリコン絶
縁膜及びポリイミド配向膜を、この順に形成した構造を
有する透明電極基板を、上記液晶をはさむ２枚の電極基
板として用いると共に、背面透明電極基板の背後に反射
層を設けたことを特徴とする液晶型防眩ミラー。[Claims] 1. In a liquid crystal anti-glare mirror using a guest-host liquid crystal, a transparent electrode made of an ITO film, a silicon nitride insulating film, and a polyimide alignment film are formed in this order on a substrate. A liquid crystal type anti-glare mirror characterized in that transparent electrode substrates having a structure are used as two electrode substrates sandwiching the liquid crystal, and a reflective layer is provided behind the back transparent electrode substrate.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59214628A JPS6193430A (en) | 1984-10-12 | 1984-10-12 | Liquid crystal type dazzling preventive mirror |
| DE19853526973 DE3526973A1 (en) | 1984-08-01 | 1985-07-27 | LIQUID CRYSTAL MIRROR-FREE MIRROR |
| US06/759,824 US4729638A (en) | 1984-08-01 | 1985-07-29 | Liquid crystal-type nonglare mirror |
| FR858511727A FR2568690B1 (en) | 1984-08-01 | 1985-07-31 | NON-GLARE MIRROR WITH LIQUID CRYSTALS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59214628A JPS6193430A (en) | 1984-10-12 | 1984-10-12 | Liquid crystal type dazzling preventive mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6193430A true JPS6193430A (en) | 1986-05-12 |
Family
ID=16658883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59214628A Pending JPS6193430A (en) | 1984-08-01 | 1984-10-12 | Liquid crystal type dazzling preventive mirror |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6193430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020149021A (en) * | 2019-03-15 | 2020-09-17 | 株式会社ジャパンディスプレイ | Display and mirror device |
-
1984
- 1984-10-12 JP JP59214628A patent/JPS6193430A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020149021A (en) * | 2019-03-15 | 2020-09-17 | 株式会社ジャパンディスプレイ | Display and mirror device |
| WO2020189016A1 (en) * | 2019-03-15 | 2020-09-24 | 株式会社ジャパンディスプレイ | Display device and mirror device |
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