JPS612126A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPS612126A
JPS612126A JP59121684A JP12168484A JPS612126A JP S612126 A JPS612126 A JP S612126A JP 59121684 A JP59121684 A JP 59121684A JP 12168484 A JP12168484 A JP 12168484A JP S612126 A JPS612126 A JP S612126A
Authority
JP
Japan
Prior art keywords
liquid crystal
crystal display
conductive film
display element
display device
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
JP59121684A
Other languages
Japanese (ja)
Inventor
Kiyoshige Kinugawa
清重 衣川
Naofumi Aoyama
青山　直文
Hidesuke Endo
遠藤　秀介
Toshiyuki Sakuma
敏幸 佐久間
Toshihiko Yabuuchi
薮内　俊彦
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP59121684A priority Critical patent/JPS612126A/en
Publication of JPS612126A publication Critical patent/JPS612126A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133334—Electromagnetic shields
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components

Abstract

PURPOSE:To prevent a liquid crystal display device from the leakage of fine radio waves through a liquid crystal display element by forming a transparent conductive film at least on the outside of one of two electrode base plates constituting the liquid crystal display element and earthing the conductive film. CONSTITUTION:The liquid crystal display element 1 is provided with upper and lower base plates 7, 8, polarizing plates 9, 10, a reflecting plate 11, a printed substrated 3, a liquid crystal driving circuit 2, etc. and the transparent conductive film 15 is formed on the outside of the upper electrode base plate 7 and earthed. To earth the conductive film 15, the conductive film 15 is contacted with a metal frame 5 and the metal frame 5 is contacted with an earth part of the printed substrate 3 or connected to the external case of the display element 1. Consequently, a fine radio wave flowing out from the liquid crystal is prevented from leakage through the element 1 by the shielding effect of the conductive film 15.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は液晶表示装置に関する。[Detailed description of the invention] [Field of application of the invention] The present invention relates to a liquid crystal display device.

〔発明の背景〕[Background of the invention]

従来の液晶表示装置は、一般に第１図に示すような構造
よりなる。即ち、液晶表示素子１と、液晶駆動用回路２
を搭載したプリント基板３間を（ゼブラコネクタ４を介
在させて接続し、金属枠５をプリント基板３に固定する
ことによって液晶表示素子１をプリント基板３に保持さ
せ、液晶表示装置６を構成している。前記プリント基板
３への金属枠５の固定は、・プリント基板３の挿入穴（
図示せず）に金属枠５の突出部５ａを挿入し、突出部５
ａを折曲げることにより行なう。A conventional liquid crystal display device generally has a structure as shown in FIG. That is, a liquid crystal display element 1 and a liquid crystal driving circuit 2
A liquid crystal display device 6 is constructed by connecting the printed circuit boards 3 mounted with the circuit board 3 (with a zebra connector 4 interposed therebetween) and fixing the metal frame 5 to the printed circuit board 3 to hold the liquid crystal display element 1 on the printed circuit board 3. The metal frame 5 is fixed to the printed circuit board 3 through the insertion hole (
(not shown) of the metal frame 5, and insert the protrusion 5a of the metal frame 5 into the
This is done by bending a.

前記液晶表示素子１は、対向面に電極が形成された２枚
の上下電極基板７．８の周囲をシール材でシールし、内
部に液晶を封入してなる。また上電極基板７の外面には
偏向板９が貼付けられ、下電極基板８の外面には偏光板
１０を介して反射板１１が貼付けられ、反射型を構成し
ている。The liquid crystal display element 1 is constructed by sealing the peripheries of two upper and lower electrode substrates 7.8, each having electrodes formed on opposing surfaces, with a sealing material, and sealing liquid crystal inside. Further, a polarizing plate 9 is attached to the outer surface of the upper electrode substrate 7, and a reflecting plate 11 is attached to the outer surface of the lower electrode substrate 8 via a polarizing plate 10, thereby forming a reflective type.

このように構成された液晶表示装置６は、第２図に示す
ように機器のゲース１２に組込まれ、一般にアクリル樹
脂の保護カバー１３を通して液晶表示素子ｌの表示内容
を見るようになっている。The liquid crystal display device 6 constructed in this manner is incorporated into a gate 12 of a device, as shown in FIG. 2, and the display content of the liquid crystal display element 1 is generally viewed through a protective cover 13 made of acrylic resin.

ところで、ｉ−ス１２は接地されＣいるので、ｉ−ス１
２を通しての電波もれはほとんどない。By the way, since the i-s 12 is grounded, the i-s 1
There is almost no signal leakage through 2.

しかしながら、液晶表示装置６は特に／−ルド効果を有
していないので、液晶駆動用回路２から液晶表示素子１
を通゛つて出る微弱な電波１４がもれるという問題があ
った。However, since the liquid crystal display device 6 does not particularly have the /- field effect, the liquid crystal display device 1 is connected to the liquid crystal drive circuit 2.
There was a problem in that the weak radio waves 14 emitted through the cable leaked.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、液晶駆動用回路から液晶表示素子を通
しＣ出る微弱なｄｌＬ波もれを防止することができる液
晶表示装置を提供することにある。An object of the present invention is to provide a liquid crystal display device that can prevent leakage of weak DLL waves emitted from a liquid crystal drive circuit through a liquid crystal display element.

〔発明の概要〕[Summary of the invention]

本発明は上記目的を達成するために、液晶表示素子と、
この液晶表示素子を駆動する回路を搭載したプリント基
板きを備えた液晶表示装置において、前記液晶表示素子
を構成する２枚の電極基板の少なくとも一方の外面に透
明導電膜を形成し、かつ前記透明導電膜を接地したこと
を特徴とする。In order to achieve the above object, the present invention includes a liquid crystal display element,
In this liquid crystal display device equipped with a printed circuit board on which a circuit for driving the liquid crystal display element is mounted, a transparent conductive film is formed on the outer surface of at least one of the two electrode substrates constituting the liquid crystal display element, and The feature is that the conductive film is grounded.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を第３図をこより説明する。な
お、第１図と同じ部材には同一符号を付し、その説明を
省略する。液晶表示素子１を構成する上電極基板７の外
面に透明導電膜１５を形成し、この透明導電膜１５を接
地しＣなる。透明導電膜１５の接地の方法としＣは、例
えば透明導電膜１５に金属枠５が接触するようをこし、
金属枠５をプリント基板３の接地部に接続するか、また
は第２図に示すケース１２に接続する。または透明導電
膜１５から直接リード線などを介してプリント基板３の
接地部、またはケース１２に接続する。前記透明導電膜
１５としては、徊えば酸化インジウムに微量の酸化スズ
を添加したものが好適である。Hereinafter, one embodiment of the present invention will be explained with reference to FIG. Note that the same members as in FIG. 1 are given the same reference numerals, and their explanations will be omitted. A transparent conductive film 15 is formed on the outer surface of the upper electrode substrate 7 constituting the liquid crystal display element 1, and this transparent conductive film 15 is grounded. The method C of grounding the transparent conductive film 15 is, for example, by placing the metal frame 5 in contact with the transparent conductive film 15,
The metal frame 5 is connected to the grounding part of the printed circuit board 3 or to the case 12 shown in FIG. Alternatively, the transparent conductive film 15 is directly connected to the ground portion of the printed circuit board 3 or the case 12 via a lead wire or the like. As the transparent conductive film 15, it is preferable to use indium oxide with a trace amount of tin oxide added.

このように、液晶表示素子１を構成する上電極基板７の
外面に透明導電膜１５を形成し、かつ前記透明導電膜１
５を接地しＣなるので、液晶駆動用回路２から液晶表示
素子１に通る微弱な電波は透明導電膜１５のシールド効
果により防止される。In this way, the transparent conductive film 15 is formed on the outer surface of the upper electrode substrate 7 constituting the liquid crystal display element 1, and the transparent conductive film 1
5 is grounded and becomes C, weak radio waves passing from the liquid crystal driving circuit 2 to the liquid crystal display element 1 are prevented by the shielding effect of the transparent conductive film 15.

なお、上記実施例におい”Ｃは、透明導電膜１５を上電
極基板７の外面に設けたが、上電極基板７に代えＣ下電
極基板８の外面に設は一〇も、または両方の電極基板７
．８の外面にそれぞれ設けてもよい。In the above embodiments, the transparent conductive film 15 was provided on the outer surface of the upper electrode substrate 7, but the transparent conductive film 15 was provided on the outer surface of the lower electrode substrate 8 instead of the upper electrode substrate 7. Board 7
．． 8 may be provided on the outer surface of each.

〔発明の効果〕〔Effect of the invention〕

以上の説明から明らかなように、本発明（こよれば、液
晶表示素子と、この液晶表示素子を駆動する回路を搭載
したプリント基板とを備えた液晶表示装置においＣ１前
記液晶表示素子を構成する２枚の電極基板の少なくとも
一方の外面に透明導電膜を形成し、かつ前記透明導電膜
を接地してなるので、液晶駆動用回路から液晶表示素子
を通し−Ｃの微弱な電波もれは透明導電膜によって防止
され、液晶表示装置を用いた機器全体の電波もれを軽減
できる。As is clear from the above description, in the present invention (according to this), in a liquid crystal display device including a liquid crystal display element and a printed circuit board on which a circuit for driving the liquid crystal display element is mounted, C1 constitutes the liquid crystal display element. A transparent conductive film is formed on the outer surface of at least one of the two electrode substrates, and the transparent conductive film is grounded, so that weak radio waves of -C leak from the liquid crystal drive circuit through the liquid crystal display element. This is prevented by the conductive film, and it is possible to reduce leakage of radio waves from the entire device using the liquid crystal display device.

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

第１図は従来の液晶表示装置の側面説明図、第２図は第
１図の液晶表示装置を組込んだ機器の概略説明図、第３
図は本発明になる液晶表示装置の一実施例を示す側面説
明図である。 １・・・液晶表示素子、　　　２・・・液晶駆動用回路
、３・・・プリント基板、　　　６・・・液晶表示装置
、７．８・・・電極基板、１５・・・透明導電膜。 第１図 第２図 第３図 らFig. 1 is a side view of a conventional liquid crystal display device, Fig. 2 is a schematic illustration of a device incorporating the liquid crystal display device of Fig. 1, and Fig. 3 is an explanatory side view of a conventional liquid crystal display device.
The figure is an explanatory side view showing one embodiment of a liquid crystal display device according to the present invention. DESCRIPTION OF SYMBOLS 1... Liquid crystal display element, 2... Liquid crystal drive circuit, 3... Printed circuit board, 6... Liquid crystal display device, 7.8... Electrode substrate, 15... Transparent conductive film. Figure 1 Figure 2 Figure 3 etc.

Claims (1)

【特許請求の範囲】[Claims] 液晶表示素子と、この液晶表示素子を駆動する回路を搭
載したプリント基板とを備えた液晶表示装置において、
前記液晶表示素子を構成する２枚の電極基板の少なくと
も一方の外面に透明導電膜を形成し、かつ前記透明導電
膜を接地したことを特徴とする液晶表示装置。In a liquid crystal display device including a liquid crystal display element and a printed circuit board equipped with a circuit for driving the liquid crystal display element,
A liquid crystal display device, characterized in that a transparent conductive film is formed on the outer surface of at least one of two electrode substrates constituting the liquid crystal display element, and the transparent conductive film is grounded.
JP59121684A 1984-06-15 1984-06-15 Liquid crystal display device Pending JPS612126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59121684A JPS612126A (en) 1984-06-15 1984-06-15 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59121684A JPS612126A (en) 1984-06-15 1984-06-15 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPS612126A true JPS612126A (en) 1986-01-08

Family

ID=14817311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59121684A Pending JPS612126A (en) 1984-06-15 1984-06-15 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPS612126A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5195822A (en) * 1990-04-24 1993-03-23 Sharp Kabushiki Kaisha Plain light source device
JPH05150214A (en) * 1991-11-27 1993-06-18 Nec Kagoshima Ltd Color liquid crystal display device
US5406399A (en) * 1991-12-17 1995-04-11 Sony Corporation Liquid crystal display apparatus having a frame around periphery and bottom and extending above both polarizers
FR2800564A1 (en) * 1999-10-27 2001-05-04 Valeo Electronique Car dashboard display mechanism earth connection having elbow shaped metallic section one end printed circuit earth connected and upper end display section connected.
EP1524549A1 (en) 2003-10-14 2005-04-20 Sony Ericsson Mobile Communications AB LCD display with an integrated shield box

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5195822A (en) * 1990-04-24 1993-03-23 Sharp Kabushiki Kaisha Plain light source device
JPH05150214A (en) * 1991-11-27 1993-06-18 Nec Kagoshima Ltd Color liquid crystal display device
US5406399A (en) * 1991-12-17 1995-04-11 Sony Corporation Liquid crystal display apparatus having a frame around periphery and bottom and extending above both polarizers
FR2800564A1 (en) * 1999-10-27 2001-05-04 Valeo Electronique Car dashboard display mechanism earth connection having elbow shaped metallic section one end printed circuit earth connected and upper end display section connected.
EP1524549A1 (en) 2003-10-14 2005-04-20 Sony Ericsson Mobile Communications AB LCD display with an integrated shield box

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