JPS61121037A - Photodeteptive display device - Google Patents

Abstract

PURPOSE:To reduce the quantity of light reflected from the surface of the display body of a photodeteptive display element by sticking a glass plate subjected to nonreflecting treatment to the front of the display element with a material having a refractive index nearly equal to the refractive index of the glass plate. CONSTITUTION:A soda lime glass plate 1 of about 1mm thickness having about 1.52 refractive index is successively coated with SiO2 to about 1,000Angstrom , ZrO2 to about 1,400Angstrom and MgF2 to 1,000Angstrom to form a nonreflecting layer 2, and the glass plate 1 having the layer 2 is used as a glass plate subjected to nonreflecting treatment. Soda lime glass substrates each having a transparent electrode 3 of ITO on the inside are placed opposite to each other with a liq. crystal layer 4 in-between. Two polarizing plates 5, 6 each formed by supporting an iodide film on a cellulose acetate film are stuck to the outsides of the substrates with an adhesive, and an irregularly reflecting plate 7 is further stuck in the same way to manufacture a liq. crystal display element 10.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明、は、視認性を高めた液晶ＥＩＣＤ、ＰＬＺＴ等
の受光型の表示装蟹に関するものである。以下、液晶を
例にとって述べるが、ＥＣＤ等においても本発明が適用
できることは言うまでもない。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a light-receiving type display device such as a liquid crystal EICD or PLZT with improved visibility. Hereinafter, a liquid crystal will be described as an example, but it goes without saying that the present invention is also applicable to ECDs and the like.

又、駆動回路部の詳細な説明も省略するが、一般番と知
られた所定の駆動をされることは言うまでもない。Further, a detailed explanation of the drive circuit section will be omitted, but it goes without saying that it is driven in a predetermined manner known as a general number.

〈従来技術〉 受光ｍ表示素子の１つである液晶表示体は、ＣＲＴ　、
ＬＥＤなどの発光表示＠置と異なって、他から光をうけ
て表示をする受光素子であるので、外光の影響をうけや
すい。従って、素子表面の反射光が、表示性能をかなり
悪くしている。そこで液晶表示素子の前面に露出してい
る偏光板上ｌこ、薄膜による干渉フィルタを設けたり、
偏光板上を荒して光を散乱させる方法で反射光を減らし
、視認性を上げてｂたが、表面がプラスチックであるた
めに、キズがついたり、摩耗によって反射光を減らした
処理の効果が減少したりした。<Prior art> A liquid crystal display, which is one of the light-receiving display elements, is a CRT,
Unlike light-emitting displays such as LEDs, it is a light-receiving element that receives light from other sources to display information, so it is easily affected by external light. Therefore, the reflected light from the element surface considerably deteriorates the display performance. Therefore, we installed a thin film interference filter on the polarizing plate exposed in front of the liquid crystal display element.
The method of reducing reflected light and increasing visibility was achieved by roughening the surface of the polarizing plate and scattering light, but since the surface is made of plastic, it could become scratched or worn, making the treatment effective in reducing reflected light less effective. It decreased.

〈発明が解決しようとする問題点〉 本発明は、受光型表示装置を構成する液晶等の受光型表
示素子の前面の反射光によるコントラスト低下を防ぎ且
つ表面の耐久性のある視認性のすぐれた受光型表示装置
を提供することを目的としている。<Problems to be Solved by the Invention> The present invention provides a light-receiving display device that prevents a decrease in contrast due to reflected light from the front surface of a light-receiving display element such as a liquid crystal that constitutes a light-receiving display device, and that has a durable surface and excellent visibility. The purpose of the present invention is to provide a light-receiving display device.

く問題を解決するための手段〉 本発明は本発明の受光型表示装置を構成する液晶等の受
光型表示素子の前面に、無反射処理したガラス板を、ガ
ラス板の材料と屈折率のほぼ等しい材料で貼り合せるこ
とによって、表示体表面からの反射光を減じたことを特
徴としている。Means for Solving Problems> The present invention provides a light-receiving type display device of the present invention, in which an anti-reflection treated glass plate is placed on the front surface of a light-receiving type display element such as a liquid crystal that constitutes a light-receiving type display device of the present invention. It is characterized by reducing the amount of light reflected from the surface of the display by bonding them together using the same materials.

以下に、実施例を用いて、内容の詳細を説明する。The details of the content will be explained below using examples.

〈実施例〉 実施例１ 無反射処理したガラス板として、厚さ約１０のリーダ・
ライムガラス板１ｉ−屈折率約１．５２）上にＢ１０ｚ
ｋ約１０００Ａ、更＋Ｃソ（７）　上ＧＣ１Ｚ　ｆ　Ｏ
。<Example> Example 1 A leader plate with a thickness of about 10 mm was used as a non-reflection treated glass plate.
B10z on lime glass plate 1i (refractive index approx. 1.52)
k approx. 1000A, further + C so (7) upper GC1Z f O
.

を約１４０ＯＡ、更にその上に、Ｍ　ｇ　１１′２を１
０００えコーティングした無反射処理層２を有するもの
を用いた。液晶表示素子は第１図に示すよりにソーダラ
イムのガラス基板内面に工ＴＯの透明電極８を有し、液
晶層４を介して対向したものをヨク化膜を、酢酸セルロ
ースフィルムで支持した２枚の偏光板５と６を接着剤、
粘着剤等で貼りつけ、更に乱反射板７を同様に貼りつけ
たものを用いた。接着層９として、紫外線硬化型のアク
リル系接着剤（硬化後の屈折率約１．４８）　を用いて
、ガラス板１と液晶表示素子ｌＯを貼り合わせた。液晶
表示素子１０の直線反射は約７％であったが、ガラス板
１ｆ：貼り合せた場合直線反射は約４チに減少した。about 140 OA, and on top of that, 1 M g 11'2
000 coated with an anti-reflection treatment layer 2 was used. As shown in FIG. 1, the liquid crystal display element has a transparent electrode 8 made of TOO on the inner surface of a glass substrate made of soda lime, and a diodide film supported with a cellulose acetate film 2 facing each other with a liquid crystal layer 4 interposed therebetween. Glue the polarizing plates 5 and 6 together.
It was attached with an adhesive or the like, and the diffused reflection plate 7 was also attached in the same way. The glass plate 1 and the liquid crystal display element 10 were bonded together using an ultraviolet curing type acrylic adhesive (refractive index after curing of about 1.48) as the adhesive layer 9. The linear reflection of the liquid crystal display element 10 was about 7%, but when the glass plate 1f was bonded, the linear reflection decreased to about 4%.

目視による比較においても、ガラス板１を貼り合せた場
合の方が、表示が鮮明であった。表面硬度はエンピッ硬
度で９Ｈ以上あり、またワイヤブラシ等でかるくこすっ
てもキズがつかなかった。更にこの液晶表示体２．６０
’０９０％下に２００時間放置したが、接着層９のはが
れ、気泡の発生もなく、また光学的な性質の変化もなか
った。Also in visual comparison, the display was clearer in the case where the glass plate 1 was bonded. The surface hardness was 9H or more on the Empi hardness, and no scratches were left even when lightly rubbed with a wire brush or the like. Furthermore, this liquid crystal display body 2.60
Although the adhesive layer 9 was left for 200 hours under 0.090%, there was no peeling of the adhesive layer 9, no generation of bubbles, and no change in optical properties.

実施例２ 液晶表示素子は実施例１と同じものを使用した。Example 2 The same liquid crystal display element as in Example 1 was used.

無反射処理したガラス板として、厚さが約１ｕのソーダ
・ライムガラス板の片面を特殊な、酸で処理して、細か
なポーラス状にしたものを使用した。As the anti-reflection treated glass plate, a soda-lime glass plate with a thickness of approximately 1 μm was treated with a special acid on one side to make it finely porous.

接着層として、厚さ約０．８ｕの可塑性ポリビニルブチ
ラール（屈折率約１．５１）を使用し偏光板の劣化のな
い約（資）℃で液晶表示体と無反射処理ガラスを貼り合
せた。こうしてできた液晶表示体の直線反射率は約８俤
であり、目視テストでも、実施例よりも更に視認性の良
い表示体であった０表面硬度は、エンピッ硬度で４〜６
Ｈであったが、偏光板表面より充分に強く、実用上の問
題はなかった。As an adhesive layer, plastic polyvinyl butyral (refractive index of about 1.51) with a thickness of about 0.8 μm was used to bond the liquid crystal display and anti-reflection treated glass at a temperature of about (100° C.) without deterioration of the polarizing plate. The linear reflectance of the liquid crystal display made in this way was about 8, and the visual test showed that the display had even better visibility than the example.The surface hardness was 4 to 6 on the Empi hardness.
Although it was H, it was sufficiently stronger than the surface of the polarizing plate, and there were no practical problems.

実施例３ 実施例１と同様の構成にし、接着層は、エチレン−酢酸
ビニル共重合体を変成した樹脂シートを使用した。表面
硬度は実施例１と同じである。また、直線反射は約８チ
であった。Example 3 The structure was the same as in Example 1, and the adhesive layer was a resin sheet obtained by modifying an ethylene-vinyl acetate copolymer. The surface hardness is the same as in Example 1. Further, the straight line reflection was about 8 inches.

実施例４ 無反射処理ガラス板として、ガラス板の表面を機械的に
乱したものも使用し、接着層として、エチレン−酢酸ビ
ニルのホットメルト接着剤を使った。この場合、表示さ
れた像が表面の乱反射層によってややぼけるが、実用上
の問題はなく、無反射処理ガラスを貼りつける前のもの
よりも視認性は向上した。Example 4 A glass plate whose surface was mechanically disturbed was also used as the anti-reflection treated glass plate, and an ethylene-vinyl acetate hot melt adhesive was used as the adhesive layer. In this case, the displayed image was slightly blurred due to the diffuse reflection layer on the surface, but there was no practical problem, and the visibility was improved compared to that before the anti-reflection treated glass was attached.

上記実施例以外に、接着層９として、透明性の良いエポ
キシ系接着剤、２波型アクリル系接着剤、アクリル系粘
着剤、シリコーン系粘着剤等を用いることもできる。ま
た、実施例のような反射型表示素子のみならず、透過型
表示素子においても同様の効果がある。In addition to the above embodiments, the adhesive layer 9 may be made of a highly transparent epoxy adhesive, a two-wave type acrylic adhesive, an acrylic adhesive, a silicone adhesive, or the like. Further, similar effects can be obtained not only in the reflective display element as in the embodiment but also in the transmissive display element.

なお、表示素子が一層でなく、多層であってもよいこと
はいうまでもない、また、液晶等の表示素子の電極基板
が無アルカリガラスや、ポリサル７オン、ポリエーテル
サルフォン、ポリエチレンテレフタレート等のプラスチ
ックフィルム（偏光子が一体化された電極基板を含む）
であってもよい。It goes without saying that the display element may be multi-layered instead of one layer, and the electrode substrate of the display element such as a liquid crystal may be made of alkali-free glass, polysal 7on, polyether sulfone, polyethylene terephthalate, etc. plastic film (including electrode substrate with integrated polarizer)
It may be.

〈発明の効果〉 以上のように、本発明によって、表面の耐久性が充分で
あり、表面反射が少なく視認性の良い液晶表示体の提供
が回軸になった。<Effects of the Invention> As described above, the present invention aims to provide a liquid crystal display with sufficient surface durability, low surface reflection, and good visibility.

更に本発明は、接着層９を設けたことｌこよって保護基
板としてのガラス板が、万−割れた場合に外部へ飛散し
ないので、安全性が高くなった。Furthermore, in the present invention, since the adhesive layer 9 is provided, even if the glass plate serving as a protective substrate is broken, it will not be scattered outside, thereby increasing safety.

本発明によって、液晶等の受光型表示装置を高デユーテ
イ駆動した場合の視認性が改良され、更ｌこは高デユー
テイ駆動の限界を広げることができる。更に、高い視認
性が必要であり且つ耐久性を必要とする計測器用ディス
プレイ、自動車用ディスプレイ等への液晶等の受光型表
示装置へも本発明の受光型表示装置を用いることができ
、応用範囲を広げるものである。According to the present invention, visibility is improved when a light-receiving display device such as a liquid crystal is driven at high duty, and the limits of high duty driving can be further expanded. Furthermore, the light-receiving display device of the present invention can also be used in light-receiving display devices such as liquid crystal displays for measuring instruments, automobile displays, etc., which require high visibility and durability, and the range of application is wide. It expands the

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

第１図は本発明の受光型表示装置の実施例である。 ｌ・参〇ガラス ２・・・無反射処理層 ９・・・接着層 以　　　上 FIG. 1 shows an embodiment of a light-receiving display device of the present invention. L・San〇glass 2...Non-reflection treatment layer 9...adhesive layer that's all

Claims (1)

【特許請求の範囲】[Claims] 前面に無反射処理したガラス板を有する受光型表示素子
を用いた受光型表示装置を構成すると共に、前記ガラス
板が該ガラス板の材料とほぼ屈折率の等しい材料であり
前記受光型表示素子に貼り合されていることを特徴とす
る受光型表示装置。A light-receiving type display device is configured using a light-receiving type display element having a glass plate treated with anti-reflection treatment on the front surface, and the glass plate is made of a material having substantially the same refractive index as the material of the glass plate, and the light-receiving type display element is A light-receiving display device characterized by being bonded together.