JPH01237523A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPH01237523A
JPH01237523A JP63063233A JP6323388A JPH01237523A JP H01237523 A JPH01237523 A JP H01237523A JP 63063233 A JP63063233 A JP 63063233A JP 6323388 A JP6323388 A JP 6323388A JP H01237523 A JPH01237523 A JP H01237523A
Authority
JP
Japan
Prior art keywords
liquid crystal
terminal
crystal display
earth terminal
terminals
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
JP63063233A
Other languages
Japanese (ja)
Inventor
Takeshi Saito
健 斉藤
Toshimitsu Matsudo
利充 松戸
Takao Azuma
東　隆雄
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 JP63063233A priority Critical patent/JPH01237523A/en
Priority to KR1019890003128A priority patent/KR960015987B1/en
Publication of JPH01237523A publication Critical patent/JPH01237523A/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
    • G02F1/1343—Electrodes
    • 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
    • H05K1/0254—High voltage adaptations; Electrical insulation details; Overvoltage or electrostatic discharge protection ; Arrangements for regulating voltages or for using plural voltages
    • 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
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • 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
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/361—Assembling flexible printed circuits with other printed circuits

Abstract

PURPOSE:To prevent the breakage of a driving IC by static electricity by providing dummy terminals in addition to segment terminals necessary for display to the above device and electrically connecting the dummy terminals to the earth terminal of a circuit board. CONSTITUTION:The dummy terminals 12 are provided in addition to the segment terminals 11 necessary for the display to the liquid crystal display element 1. A power supply terminal 31 connected to a power supply 4 and the earth terminal 32 are provided to the circuit board 3 and earth terminal connecting parts 32a, 32b to be connected with the earth terminal 24 and connecting terminals 25 of a flexible circuit board 2 are provided to the earth terminal 32. The dummy terminals 12 are connected through the connecting terminals 25 and the earth terminal connecting parts 32b to the earth terminal 32. The electric charge electrified on the surface of the liquid crystal display element 1 from the outside is thereby passed from the dummy terminals 12 to the earth terminal 32 of the circuit board 3 and, therefore, no influence is exerted on the driving IC 21 and the breakage of the driving IC 21 is prevented.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は液晶表示装置に係り、特ｌこ静電気防止構造に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device, and more particularly to an antistatic structure.

〔従来の技術〕[Conventional technology]

従来、静電気防止を図った液晶表示装置として、例えば
実公昭５８−３１１８８号公報に示すようｌこ、液晶表
示素子と回路基板を固定する金属枠を回路基板のアース
端子醗こ接続し、金属枠をシールド材として使用したも
のが知られている。Conventionally, as shown in Japanese Utility Model Publication No. 58-31188, a liquid crystal display device designed to prevent static electricity has been manufactured by connecting a metal frame for fixing a liquid crystal display element and a circuit board to the earth terminal of the circuit board. It is known that this material is used as a shielding material.

これにより、液晶表示素子を駆動する時の駆動電圧によ
る外部への影響を金属枠でシールドして小さくしている
。As a result, the influence of the drive voltage on the outside when driving the liquid crystal display element is shielded by the metal frame and reduced.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上記従来技術は、駆動電圧による外部への影響は小さく
なるが、外部からの静電気ｌこ対しては配慮がなされて
おらず、表示面擾こ帯電した電荷により駆動ＩＣが破壊
されるという問題があった。Although the above conventional technology reduces the external influence of the drive voltage, it does not take into consideration static electricity from the outside, and there is a problem that the drive IC may be destroyed by the charge that is accumulated on the display surface. there were.

このことを更に詳記すると、液晶表示素子は表示器のた
め、セット部品でも一番外側擾こ実装され、しかも表示
面は直接子にふれる機会が多い。このため、帯電した物
体が表示面に近づくと液晶表示素子の表示面に帯電し、
この帯電した電荷はセグメントを通して放電する場合が
あり、電荷が大きい時、セグメントを駆動する駆動ＩＣ
を破壊する。To explain this in more detail, since the liquid crystal display element is a display device, it is mounted on the outermost side of the set, and there are many opportunities for the display surface to be directly touched. Therefore, when a charged object approaches the display surface, the display surface of the liquid crystal display element is charged,
This charged charge may discharge through the segment, and when the charge is large, the drive IC that drives the segment
destroy.

本発明の目的は、静電気による駆動ＩＣの破壊を防止す
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 a drive IC from being destroyed by static electricity.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的は、液晶表示素子に表示目的のセグメント端子
以外のダミー端子を設け、このダミー端子を回路基板の
アース端子に電気的に接続することにより達成される。The above object is achieved by providing a dummy terminal other than the segment terminal for display purposes on the liquid crystal display element and electrically connecting the dummy terminal to the ground terminal of the circuit board.

〔作用〕[Effect]

液晶表示素子の表示面に帯電した電荷は、ダミー端子か
ら回路基板のアース端子に流れ、セグメント駆動回路に
影響を及ぼさないため、駆動ＩＣを破壊することはない
。The electric charge on the display surface of the liquid crystal display element flows from the dummy terminal to the ground terminal of the circuit board and does not affect the segment drive circuit, so it does not destroy the drive IC.

〔実施例〕〔Example〕

以下、本発明の一実施例を第１図及び第２図により説明
する。液晶表示素子１には不来懺示に必要なセグメント
端子１１の他にダミー端子１２が設けられている。この
液晶表示素子１に接続されるフレキシブル基板２には、
駆動ＩＣ２１が搭載されており、この駆動ＩＣ２１に接
続された一方側の出力端子２２が前記セグメント端子１
１に対応して設けられ、駆動ＩＣ２１１こ接続された他
方側の電源端子２３及びアース端子２４が後記する回路
基板３側に設けられ、更に前記ダミー端子１２に対応し
て接続端子２５が設けられている。回路基板３には、電
源４に接続される電源端子３１及びアース端子３２が設
けられており、電源端子３１には前記フレキシブル基板
２の電源端子２３が接続される電源端子接続部３１ａが
設けられ、アース端子３２１こは前記フレキシブル基板
２のアース端子２４及び接続端子２５が接続されるアー
ス端子接続部３２　ａ、　３２　ｂが設けられている。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The liquid crystal display element 1 is provided with dummy terminals 12 in addition to the segment terminals 11 necessary for indicating non-arrival. The flexible substrate 2 connected to this liquid crystal display element 1 includes:
A drive IC 21 is mounted, and an output terminal 22 on one side connected to the drive IC 21 is connected to the segment terminal 1.
A power terminal 23 and a ground terminal 24 on the other side connected to the drive IC 211 are provided on the circuit board 3 side, which will be described later, and a connection terminal 25 is provided corresponding to the dummy terminal 12. ing. The circuit board 3 is provided with a power terminal 31 and a ground terminal 32 that are connected to the power source 4, and the power terminal 31 is provided with a power terminal connection portion 31a to which the power terminal 23 of the flexible board 2 is connected. , a ground terminal 321 is provided with ground terminal connecting portions 32 a and 32 b to which the ground terminal 24 and connection terminal 25 of the flexible substrate 2 are connected.

そこで、液晶表示素子１とフレキシブル基板２とを異方
性コネクタ（図示せず）により接続すると、セグメント
端子１１は出力端子２２に、ダミー端子１２は接続端子
２５にそれぞれ電気的に接続される。またフレキシブル
基板２と回路基板３とは、電源端子２３と電源端子接続
部３１ａ１アース端子２４とアース端子接続部３２ａ１
接続端子２５とアース端子接続部３２ｂをそれぞれ半田
付は擾こより接続する。これにより、ダミー端子１２は
接続端子２５、アース端子接続部３２ｂを通してアース
端子３２に電気的に接続される。Therefore, when the liquid crystal display element 1 and the flexible substrate 2 are connected by an anisotropic connector (not shown), the segment terminals 11 are electrically connected to the output terminals 22, and the dummy terminals 12 are electrically connected to the connection terminals 25. Furthermore, the flexible board 2 and the circuit board 3 include a power terminal 23, a power terminal connection part 31a1, a ground terminal 24, and a ground terminal connection part 32a1.
The connection terminal 25 and the ground terminal connection portion 32b are connected by soldering. Thereby, the dummy terminal 12 is electrically connected to the ground terminal 32 through the connection terminal 25 and the ground terminal connection portion 32b.

従って、外部から液晶表示素子１の表示面に帯電した電
荷は、ダミー端子１２から回路基板３のアース端子３２
に流れるので、駆動ＩＣ２１に影響を与えることがなく
、駆動ＩＣの破壊は防止される。また製造工程における
取扱いによって発生する静電気によるＩＣ破壊の防止に
も効果がある。Therefore, the electric charge accumulated on the display surface of the liquid crystal display element 1 from the outside is transferred from the dummy terminal 12 to the ground terminal 32 of the circuit board 3.
Since the current flows to the drive IC 21, the drive IC 21 is not affected, and the drive IC is prevented from being destroyed. It is also effective in preventing IC breakdown due to static electricity generated during handling during the manufacturing process.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、液晶表示素子の表示面ｌこ帯電する電
荷をアースに放電できるので、静電気による駆動ＩＣの
破壊を防止することができる。According to the present invention, since the electric charge accumulated on the display surface of the liquid crystal display element can be discharged to the ground, it is possible to prevent the drive IC from being destroyed by static electricity.

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

ｔｓ１図は本発明の一実施例を示す全体構成の平面図、
第２図は第１図の分解斜視図である。 １・・・液晶表示素子、１１・・・セグメント端子、１
２・・・ダミー端子、　　　２・・・フレキシブル基板
、２５・・・接続端子、　　　３・・・回路基板、３２
・・・アース端子。 第１図 第２図 ｌＯts1 diagram is a plan view of the overall configuration showing one embodiment of the present invention,
FIG. 2 is an exploded perspective view of FIG. 1. 1...Liquid crystal display element, 11...Segment terminal, 1
2... Dummy terminal, 2... Flexible board, 25... Connection terminal, 3... Circuit board, 32
...Earth terminal. Figure 1 Figure 2 lO

Claims (1)

【特許請求の範囲】[Claims] １、液晶表示素子に表示に必要なセグメント端子以外の
ダミー端子を設け、このダミー端子を回路基板のアース
端子に電気的に接続したことを特徴とする液晶表示装置
。1. A liquid crystal display device characterized in that a liquid crystal display element is provided with a dummy terminal other than the segment terminals necessary for display, and the dummy terminal is electrically connected to a ground terminal of a circuit board.
JP63063233A 1988-03-18 1988-03-18 Liquid crystal display device Pending JPH01237523A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP63063233A JPH01237523A (en) 1988-03-18 1988-03-18 Liquid crystal display device
KR1019890003128A KR960015987B1 (en) 1988-03-18 1989-03-14 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63063233A JPH01237523A (en) 1988-03-18 1988-03-18 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPH01237523A true JPH01237523A (en) 1989-09-22

Family

ID=13223293

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63063233A Pending JPH01237523A (en) 1988-03-18 1988-03-18 Liquid crystal display device

Country Status (2)

Country Link
JP (1) JPH01237523A (en)
KR (1) KR960015987B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0508137A2 (en) * 1991-03-11 1992-10-14 Rohm Co., Ltd. Liquid-crystal display device and process for producing the same
JPH0546033U (en) * 1991-11-19 1993-06-18 船井電機株式会社 Semiconductor mounting structure
US5283677A (en) * 1991-05-31 1994-02-01 Alps Electric Co., Ltd. Liquid crystal display with ground regions between terminal groups
US7738244B2 (en) 2006-09-15 2010-06-15 Epson Imaging Devices Corporation Display device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111627353A (en) * 2020-04-30 2020-09-04 惠州市德赛西威汽车电子股份有限公司 Segment code LCD instrument structure with high antistatic performance

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0508137A2 (en) * 1991-03-11 1992-10-14 Rohm Co., Ltd. Liquid-crystal display device and process for producing the same
EP0508137A3 (en) * 1991-03-11 1993-01-20 Rohm Co., Ltd. Liquid-crystal display device and process for producing the same
US5283677A (en) * 1991-05-31 1994-02-01 Alps Electric Co., Ltd. Liquid crystal display with ground regions between terminal groups
JPH0546033U (en) * 1991-11-19 1993-06-18 船井電機株式会社 Semiconductor mounting structure
JPH0751794Y2 (en) * 1991-11-19 1995-11-22 船井電機株式会社 Semiconductor mounting structure
US7738244B2 (en) 2006-09-15 2010-06-15 Epson Imaging Devices Corporation Display device

Also Published As

Publication number Publication date
KR960015987B1 (en) 1996-11-25
KR890015052A (en) 1989-10-28

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