JPH0572523A - Light shielding film for liquid crystal - Google Patents

Light shielding film for liquid crystal

Info

Publication number
JPH0572523A
JPH0572523A JP3307292A JP30729291A JPH0572523A JP H0572523 A JPH0572523 A JP H0572523A JP 3307292 A JP3307292 A JP 3307292A JP 30729291 A JP30729291 A JP 30729291A JP H0572523 A JPH0572523 A JP H0572523A
Authority
JP
Japan
Prior art keywords
liquid crystal
film
shielding film
light shielding
light
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
JP3307292A
Other languages
Japanese (ja)
Inventor
Yuko Hochido
雄幸 寳地戸
Masayoshi Narita
政義 成田
Toshiaki Azuma
敏明 吾妻
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.)
Kojundo Kagaku Kenkyusho KK
Original Assignee
Kojundo Kagaku Kenkyusho KK
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 Kojundo Kagaku Kenkyusho KK filed Critical Kojundo Kagaku Kenkyusho KK
Priority to JP3307292A priority Critical patent/JPH0572523A/en
Publication of JPH0572523A publication Critical patent/JPH0572523A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide a light shielding film for a liquid crystal display having low light transmissivity and high resistivity, capable of annealing at a high temp. and not affected by heat in a process for sealing a liquid crystal injecting hole. CONSTITUTION:A film of MnxFeyOz (where 0.8<=x<=1.2, 1.6<=y<=2.4 and 3.2<=z<=4.8) is used as a light shielding film 2 in place of a conventional film formed by printing with an org. polymer contg. a dispersed black pigment. The oxide film may be formed by sputtering, vapor deposition or printing with paste of the oxide.

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、液晶ディスプレイに使
用される遮光膜に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light shielding film used for liquid crystal displays.

【0002】[0002]

【従来の技術】液晶ディスプレイの作動原理は次の通り
である。規則的な分子配向をもった液晶は光学的に一軸
性である。そこで透明電極をもったサンドウィッチセル
の中に、分子軸を一方向に揃えるように液晶を注入する
と光学的に一軸性のセルが得られる。
2. Description of the Related Art The operating principle of a liquid crystal display is as follows. A liquid crystal having a regular molecular orientation is optically uniaxial. Therefore, an optically uniaxial cell is obtained by injecting liquid crystal into a sandwich cell having a transparent electrode so that the molecular axes are aligned in one direction.

【0003】このセルに外部から電場を加えると、液晶
の誘電率や電導度の異方性のために、分子軸を別の方向
に向けるような力を液晶分子が受ける。電場によるこの
トルクの大きさが液晶の弾性限界内にあれば、ある程度
の変位(分子軸の回転)が起こったところで弾性的な復
元力と釣合うことになる。したがって、この状態ではセ
ルの光学的主軸の向きは電場を加える以前とは異なって
いるはずである。
When an electric field is applied to the cell from the outside, the liquid crystal molecules receive a force that directs the molecular axis in another direction due to the anisotropy of the dielectric constant and the electric conductivity of the liquid crystal. If the magnitude of the torque due to the electric field is within the elastic limit of the liquid crystal, it will be balanced with the elastic restoring force when some displacement (rotation of the molecular axis) occurs. Therefore, in this state, the orientation of the optical principal axis of the cell should be different from that before applying the electric field.

【0004】液晶を光学系の中の一つの変調器として見
ると、液晶に加えられた電気的入力が液晶の光学的性質
の変化をひき起こし、その結果、液晶層を通過した光は
ある変調を受けることになる。
Viewing the liquid crystal as a modulator in an optical system, an electrical input applied to the liquid crystal causes a change in the optical properties of the liquid crystal, so that light passing through the liquid crystal layer undergoes some modulation. Will be received.

【0005】液晶ディスプレイの作動原理は以上の通り
であるので、液晶ディスプレイの基本構造は透明電極を
もったサンドウィッチセルの中に液晶が注入してあると
いう極めて単純な構造である。
Since the operating principle of the liquid crystal display is as described above, the basic structure of the liquid crystal display is an extremely simple structure in which liquid crystal is injected into a sandwich cell having transparent electrodes.

【0006】しかし、このような構造では、液晶ディス
プレイが大型化した場合、種々な問題点が発生する。す
なわち、サンドウィッチセルの平行度が保ちにくいため
画面に表示ムラが起こったり、応答速度が遅くなる等の
欠点である。
However, with such a structure, various problems occur when the liquid crystal display becomes large in size. That is, it is difficult to maintain the parallelism of the sandwich cells, which causes the display unevenness on the screen and the slow response speed.

【0007】これらの欠点を克服するため、最近、TF
T(シンフィルムトランジスタ)液晶ディスプレイが開
発された。これは液晶ディスプレイの中にトランジスタ
を組み込んだもので、このトランジスタによって液晶を
作動させるものである。このTFT液晶ディスプレイの
断面図を図1に示す。このようなディスプレイを多数個
並べて大画面を構成する。このようなTFT液晶ディス
プレイによれば、応答速度が早い、画面に表示ムラがな
くコントラストがよい等の利点がある。
In order to overcome these drawbacks, TF has recently been used.
A T (Thin Film Transistor) liquid crystal display was developed. This is a liquid crystal display in which a transistor is built in, and the liquid crystal is activated by this transistor. A sectional view of this TFT liquid crystal display is shown in FIG. A large screen is constructed by arranging a large number of such displays. According to such a TFT liquid crystal display, there are advantages that the response speed is fast, there is no display unevenness on the screen, and the contrast is good.

【0008】元来、ハイビジョン用ディスプレイとは、
ワイドで臨場感に溢れた鮮明で質の高い画像を表示でき
るものをいう。大型パネルの全面に薄膜トランジスタを
形成するのは容易ではないという問題点はあるが、高画
質のこのアクティブマトリックス方式はハイビジョン用
ディスプレイとして最も期待されている壁掛液晶ディス
プレイである。
Originally, the high-definition display was
It is a device that can display a wide, immersive, clear, and high-quality image. Although there is a problem that it is not easy to form a thin film transistor on the entire surface of a large-sized panel, this active matrix method with high image quality is a wall-mounted liquid crystal display most expected as a high-definition display.

【0009】図1に示す通り、ガラス基板1−1には遮
光膜(ブラック・マトリックス)2、カラー・フィルタ
3、透明電極膜4−1、配向膜5−1が付属している。
この遮光膜2は薄膜トランジスタ部分を遮へいする目的
で設置されており、遮光膜を除いたセルの視覚面はカラ
ー・フィルタで覆われている。
As shown in FIG. 1, a light shielding film (black matrix) 2, a color filter 3, a transparent electrode film 4-1, and an alignment film 5-1 are attached to a glass substrate 1-1.
The light-shielding film 2 is provided for the purpose of shielding the thin film transistor portion, and the visual surface of the cell excluding the light-shielding film is covered with a color filter.

【0010】従来、この遮光膜には黒色顔料を添加分散
した有機高分子材料を印刷した膜が用いられている。し
かし、この遮光膜は、光透過率が大きい、固有抵抗が低
い等の欠点がある。また、基板に蒸着した透明電極膜は
高温でアニールしないと電極膜の抵抗を低くできない
が、遮光膜に有機高分子材料を主成分として使用してい
るため、許されるアニール温度は200℃以下であり、
高温アニールができない欠点がある。また、サンドウィ
ッチセルの中に液晶を注入したのち、注入口を封止する
工程で熱がかかるが、この熱によって遮光膜が劣化する
欠点がある。
Conventionally, a film printed with an organic polymer material in which a black pigment is added and dispersed is used as the light-shielding film. However, this light-shielding film has drawbacks such as high light transmittance and low specific resistance. In addition, the transparent electrode film deposited on the substrate cannot reduce the resistance of the electrode film unless it is annealed at a high temperature, but since the organic polymer material is used as the main component for the light-shielding film, the allowable annealing temperature is 200 ° C or lower. Yes,
There is a drawback that high temperature annealing cannot be performed. Further, after the liquid crystal is injected into the sandwich cell, heat is applied in the step of sealing the injection port, but this heat has a drawback that the light shielding film is deteriorated.

【0011】[0011]

【発明が解決しようとする課題】本発明は、上記の欠点
を克服し、光透過率が小さく、固有抵抗が高く、高温ア
ニールが可能で、かつ、封止工程での熱の影響のない新
規な液晶ディスプレイ用遮光膜を提供しようとするもの
である。
The present invention overcomes the above-mentioned drawbacks, has a low light transmittance, a high specific resistance, enables high temperature annealing, and is free from the influence of heat in the sealing process. Another object of the present invention is to provide a light-shielding film for a liquid crystal display.

【0012】[0012]

【課題を解決するための手段】本発明は、遮光膜の材料
にMnFeを用いることによって目的を達成す
ることができる。MnFeのxは0.8〜1.
2,yは1.6〜2.4,zは3.2〜4.8の範囲内
にあるものである。
The present invention can achieve the object by using Mn x Fe y O z as the material of the light shielding film. The x of Mn x Fe y O z is 0.8 to 1.
2, y is in the range of 1.6 to 2.4, and z is in the range of 3.2 to 4.8.

【0013】MnFeの着膜はスパッタ蒸着で
もよく、該材料をペーストにして印刷着膜してもよく、
また、その他の着膜法であってもよい。また、Mn
の中にCuO,C等を少量添加してもよい。
The Mn x Fe y O z coating film may be formed by sputter deposition, or may be formed into a paste by printing the material.
Also, other film deposition methods may be used. In addition, Mn x F
A small amount of CuO, C or the like may be added to e y O z .

【0014】本発明になる遮光膜は光透過率1%以下の
黒色の膜である。さらに、この膜は無機材料であるた
め、200℃以上の高温でアニールが可能であり、ま
た、封止工程での熱の影響を受けることもない。
The light-shielding film according to the present invention is a black film having a light transmittance of 1% or less. Furthermore, since this film is an inorganic material, it can be annealed at a high temperature of 200 ° C. or higher, and is not affected by heat in the sealing step.

【0015】[0015]

【実施例】6インチφ×6tの大きさのMnFe
のスパッタリングターゲットを作成した。このターゲッ
トをRFスパッタ装置を用いて、出力500W、20分
間、スパッタレイト250オングストローム/分でスパ
ッタし、ガラス基板上に膜厚5000オングストローム
の黒色薄膜を着膜した。
EXAMPLE MnFe 2 O 4 having a size of 6 inches φ × 6t
The sputtering target of was created. This target was sputtered using an RF sputtering device at an output of 500 W for 20 minutes at a sputter rate of 250 Å / min to deposit a black thin film of 5000 Å on a glass substrate.

【0016】この膜の光透過率を測定した結果、波長5
50nmで0.7%であった。また、この膜の固有抵抗
を測定した結果、1.5×10Ωcmであり、充分高
い固有抵抗が得られることがわかった。さらに、この基
板を500℃、30分間アニールした結果、この遮光膜
には何らの異常も認めることができなかった。
As a result of measuring the light transmittance of this film, a wavelength of 5
It was 0.7% at 50 nm. Moreover, as a result of measuring the specific resistance of this film, it was found that the specific resistance was 1.5 × 10 6 Ωcm, which was sufficiently high. Furthermore, as a result of annealing this substrate at 500 ° C. for 30 minutes, no abnormality was observed in this light shielding film.

【0017】[0017]

【発明の効果】本発明によれば、遮光膜が無機物質であ
るため、高温アニールが可能であり、封止工程での熱の
影響を受けない特徴がある。また、光透過率1%以下の
低透過率の黒色遮光膜を得ることができる特徴がある。
さらに、固有抵抗が高い遮光膜を得ることができる特徴
がある。
According to the present invention, since the light-shielding film is an inorganic material, it can be annealed at a high temperature and is not affected by heat in the sealing process. Further, there is a feature that a black light-shielding film having a low transmittance with a light transmittance of 1% or less can be obtained.
Further, there is a feature that a light shielding film having a high specific resistance can be obtained.

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

【図1】TFT液晶ディスプレイの断面図である。FIG. 1 is a cross-sectional view of a TFT liquid crystal display.

【符号の説明】[Explanation of symbols]

1−1、1−2 ガラス基板 2 遮光膜 3 カラー・フィルタ 4−1、4−2 透明電極膜 5−1、5−2 配向膜 6 液晶 7 ゲート絶縁膜 8 ゲート電極 9 アモルファスSi 10 ソース電極 11 ドレイン電極 12 保護膜 1-1, 1-2 Glass substrate 2 Light shielding film 3 Color filter 4-1, 4-2 Transparent electrode film 5-1, 5-2 Alignment film 6 Liquid crystal 7 Gate insulating film 8 Gate electrode 9 Amorphous Si 10 Source electrode 11 Drain electrode 12 Protective film

─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成3年11月27日[Submission date] November 27, 1991

【手続補正1】[Procedure Amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】0006[Correction target item name] 0006

【補正方法】変更[Correction method] Change

【補正内容】[Correction content]

【0006】 しかし、このような構造では、液晶ディ
スプレイが大型化した場合、種々な問題点が発生する。
すなわち、サンドウィッチセルの平行度が保ちにくいた
め画面に表示ムラが起こったり、応答速度が遅くなる等
の欠点がある。
However, with such a structure, various problems occur when the liquid crystal display becomes large in size.
That is, since it is difficult to maintain the parallelism of the sandwich cells, there are drawbacks such as uneven display on the screen and slow response speed.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 液晶ディスプレイに使用される遮光膜に
MnFeを用いることを特徴とする液晶用遮光
膜。
1. A light-shielding film for liquid crystal, wherein Mn x Fe y O z is used for a light-shielding film used in a liquid crystal display.
【請求項2】 MnFeのxが0.8〜1.
2,yが1.6〜2.4,zが3.2〜4.8の範囲内
にあることを特徴とする請求項1の液晶用遮光膜。
2. The x of Mn x Fe y O z is 0.8 to 1.
2. The light-shielding film for liquid crystal according to claim 1, wherein 2, y is in the range of 1.6 to 2.4, and z is in the range of 3.2 to 4.8.
JP3307292A 1991-09-10 1991-09-10 Light shielding film for liquid crystal Pending JPH0572523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3307292A JPH0572523A (en) 1991-09-10 1991-09-10 Light shielding film for liquid crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3307292A JPH0572523A (en) 1991-09-10 1991-09-10 Light shielding film for liquid crystal

Publications (1)

Publication Number Publication Date
JPH0572523A true JPH0572523A (en) 1993-03-26

Family

ID=17967380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3307292A Pending JPH0572523A (en) 1991-09-10 1991-09-10 Light shielding film for liquid crystal

Country Status (1)

Country Link
JP (1) JPH0572523A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0740183A1 (en) * 1995-04-24 1996-10-30 DAINICHI SEIKA COLOR &amp; CHEMICALS MFG. CO. LTD. Composition for black matrix, formation of black matrix and article provided with black matrix

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60122728A (en) * 1983-11-19 1985-07-01 バイエル・アクチエンゲゼルシヤフト Black color pigment and manufacture
JPS6360422A (en) * 1986-08-30 1988-03-16 Canon Inc Ferroelectric liquid crystal element
JPS6442359A (en) * 1987-08-11 1989-02-14 Narumi China Corp Black alumina ceramic composition
JPH02196034A (en) * 1988-12-08 1990-08-02 Bayer Ag Black pigment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60122728A (en) * 1983-11-19 1985-07-01 バイエル・アクチエンゲゼルシヤフト Black color pigment and manufacture
JPS6360422A (en) * 1986-08-30 1988-03-16 Canon Inc Ferroelectric liquid crystal element
JPS6442359A (en) * 1987-08-11 1989-02-14 Narumi China Corp Black alumina ceramic composition
JPH02196034A (en) * 1988-12-08 1990-08-02 Bayer Ag Black pigment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0740183A1 (en) * 1995-04-24 1996-10-30 DAINICHI SEIKA COLOR &amp; CHEMICALS MFG. CO. LTD. Composition for black matrix, formation of black matrix and article provided with black matrix

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