JPH01232326A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPH01232326A
JPH01232326A JP63058285A JP5828588A JPH01232326A JP H01232326 A JPH01232326 A JP H01232326A JP 63058285 A JP63058285 A JP 63058285A JP 5828588 A JP5828588 A JP 5828588A JP H01232326 A JPH01232326 A JP H01232326A
Authority
JP
Japan
Prior art keywords
liquid crystal
crystal display
terminals
connection
connector
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.)
Granted
Application number
JP63058285A
Other languages
Japanese (ja)
Other versions
JP2650949B2 (en
Inventor
Takeshi Saito
健 斎藤
Takao Azuma
東　隆雄
Toshimitsu Matsudo
利充 松戸
Takao Tanabe
田部　貴雄
Kiyoshige Kinugawa
清重 衣川
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 JP63058285A priority Critical patent/JP2650949B2/en
Priority to KR1019890003074A priority patent/KR890015057A/en
Publication of JPH01232326A publication Critical patent/JPH01232326A/en
Application granted granted Critical
Publication of JP2650949B2 publication Critical patent/JP2650949B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H05K1/0266—Marks, test patterns or identification means
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

PURPOSE:To quantitatively and surely decide the connecting state between connecting terminals by adding dummy terminals for inspecting the connecting state to the extension part of the connecting terminal arrangement. CONSTITUTION:The dummy terminals I1, I12 are provided to a liquid crystal element 1 and the dummy terminals -O1, -O2, -O13, -O14 are provided to a flexible substrate 2. The connecting terminals of the liquid crystal element 1 and the connecting terminals of the flexible substrate 2 are connected by an anisotropic connector. The circuit of -O1 connector 4 I1 connector 4 -O2 is, therefore, formed on the left side and the similar circuit is formed on the right side as well. The connecting state is judged to be normal if the resistance values between the -O1 and the -O2 and between the -O13 and the -O14 is <=50OMEGA. The positioning and press welding are executed again when the values are above the specified value. The connecting state is thereby quantitatively decided and the liquid crystal element having the high reliability is obtd.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、液晶表示素子駆動用のＩＣチップを実装した
フレキシブルテープ基板上の駆動回路の接続端子と、液
晶表示素子電極の接続端子との間の異方性コネクタによ
る接続状態の良否を、容易に的確に判定できるようにし
た液晶表示装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for connecting connection terminals of a drive circuit on a flexible tape substrate mounted with an IC chip for driving a liquid crystal display element and connection terminals of a liquid crystal display element electrode. The present invention relates to a liquid crystal display device in which it is possible to easily and accurately determine the quality of the connection between the anisotropic connectors.

［従来の技術］ 液晶表示装置は電力消費量が少なくて済み、電池を電源
にすることが可能で、携帯用に好適なため、ますます小
形化、薄形化が図られている。[Prior Art] Liquid crystal display devices consume less power, can be powered by batteries, and are suitable for portable use, so they are becoming increasingly smaller and thinner.

小形化、薄形化を図り、同時に量産性向上を図るには、
液晶表示素子を駆動するためのＩＣチップを、即動回路
配線を印刷したフレキシブルテープ基板上に実装するＴ
ＡＢ方式が好都合である。In order to make the product smaller and thinner, and at the same time improve mass production,
An IC chip for driving a liquid crystal display element is mounted on a flexible tape substrate with quick-acting circuit wiring printed on it.
The AB method is advantageous.

また、液晶表示装置の、液晶表示素子の接続端子と駆動
回路の接続端子の間を、特開昭５１−１４８３９８号公
報に開示されているように、異方性コネクタを利用して
接続すると接続工程が簡単になって生産性が向上するが
、圧着条件の変動などで、電気的接続が確実に行われな
い場合が生ずる。In addition, if the connection terminal of the liquid crystal display element of the liquid crystal display device and the connection terminal of the drive circuit are connected using an anisotropic connector as disclosed in Japanese Patent Application Laid-open No. 148398/1980, connection can be made. Although this simplifies the process and improves productivity, there are cases where electrical connections cannot be made reliably due to variations in crimping conditions.

また、ＴＡＢ方式と異方性コネクタを併用したときは、
液晶表示素子側の接続端子が異方性コネクタとテープ基
板の蔭となる。フレキシブルテープ基板のテープ材料に
は、甜熱性などの面から一般に７５〜１２５μｍ厚のポ
リイミド樹脂フィルムが用いられているが、このテープ
材料の光透過性は十分ではない。ＴＡＢ方式の場合、Ｉ
Ｃチップの出力が直接液晶表示素子の旋動電極に接続さ
れるので、接続状態の、確認は大切であるが、外観検査
に頼らざるを得ない。しかし、上記の様な事態で、外観
検査による接続状態の管理は困難であった・ ［発明が解決しようとする課題］ 本発明は上記従来の課題を解決し、液晶表示素子側の接
続端子とフレキシブルテープ基板側接続端子との異方性
コネクタによる接続状態の良否を、確実に定量的に判定
できるようにした液晶表示装置を提供することを目的と
する。Also, when using the TAB method and anisotropic connector together,
The connection terminal on the liquid crystal display element side is behind the anisotropic connector and tape substrate. A polyimide resin film having a thickness of 75 to 125 μm is generally used as the tape material of the flexible tape substrate from the viewpoint of heat resistance, but the light transmittance of this tape material is not sufficient. In the case of TAB method, I
Since the output of the C chip is directly connected to the rotating electrode of the liquid crystal display element, it is important to check the connection state, but it is necessary to rely on visual inspection. However, in the above-mentioned situation, it was difficult to manage the connection state by visual inspection. [Problems to be solved by the invention] The present invention solves the above-mentioned conventional problems, and improves the connection terminals on the liquid crystal display element side. It is an object of the present invention to provide a liquid crystal display device that can reliably and quantitatively determine whether or not the connection state of an anisotropic connector with a flexible tape substrate side connection terminal is good or bad.

［課題を解決するための手段］ 上記課題を解決するために本発明においては、液晶表示
素子とフレキシブルテープ基板の夫々に。[Means for Solving the Problems] In order to solve the above problems, the present invention provides for each of a liquid crystal display element and a flexible tape substrate.

表示や吐動に必要な接続端子のほかに、これら接続端子
配列の延長部に、接続端子間の異方性コネクタによる接
続状態検査用のダミー端子を付加して配列し、異方性コ
ネクタを前記必要な接続端子と共用した前記ダミー端子
間の接続状態を検査することにより、前記必要な接続端
子間の接続状態の良否を推定できるようにした。In addition to the connection terminals necessary for display and discharge, dummy terminals are added to the extensions of these connection terminal arrays for testing the connection status using anisotropic connectors between the connection terminals, and the anisotropic connectors are By inspecting the connection state between the necessary connection terminal and the dummy terminal that is shared, it is possible to estimate whether the connection state between the necessary connection terminals is good or bad.

［作用］ 上記のように配設したダミー端子は、十分信頼性のある
技術によって形成されるので、液晶表示素子側とフレキ
シブルテープ側のダミー端子は正確に相対向して配列さ
れ、これらダミー端子間の異方性コネクタによる接続状
態は、表示や素子の即動に必要な接続端子間の異方性コ
ネクタによる接続状態と同様であると推測して差し支え
ない。[Function] The dummy terminals arranged as described above are formed using a sufficiently reliable technique, so that the dummy terminals on the liquid crystal display element side and the flexible tape side are arranged to accurately face each other, and these dummy terminals It is safe to assume that the connection state using an anisotropic connector between the terminals is the same as the connection state using an anisotropic connector between connection terminals necessary for display and immediate movement of elements.

従ってダミー端子間の抵抗値を測定して、ある所定値よ
り小さい場合は、液晶表示装置に必要な接続端子間の接
続状態は良好であると見做し、所定値より大きい場合は
、液晶表示装置に必要な接続端子間の接続状態に問題が
あり１作業の見直しが必要であると見做す。Therefore, when measuring the resistance value between the dummy terminals, if it is smaller than a certain predetermined value, it is assumed that the connection state between the connection terminals necessary for the liquid crystal display device is good, and if it is larger than the predetermined value, the resistance value is It is considered that there is a problem with the connection between the connection terminals necessary for the device, and that one work needs to be reviewed.

［実施例］ 第１図は本発明一実施例の平面図、第２図は従来の液晶
表示装置の液晶表示素子側とフレキシブルテープ側の接
続端子部の平面図、第３図は実施例や従来例の接続端子
接続部の側断面図である。[Example] Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a plan view of a connecting terminal portion between the liquid crystal display element side and the flexible tape side of a conventional liquid crystal display device, and Fig. 3 is a plan view of an embodiment of the present invention. FIG. 3 is a side sectional view of a conventional connection terminal connection portion.

第１図に示す本発明の実施例では、液晶表示素子１に、
ダミー端子部い　１１□を設け、フレキシブル基板２に
ダミー端子○い０２、○□３、○、うを設ける。液晶表
示素子の接続端子とフレキシブル基板の接続端子が異方
性コネクタ４で接続される。In the embodiment of the present invention shown in FIG. 1, the liquid crystal display element 1 includes:
A dummy terminal portion 11□ is provided, and dummy terminals ○□02, ○□3, ○, and □ are provided on the flexible board 2. The connection terminals of the liquid crystal display element and the connection terminals of the flexible substrate are connected by an anisotropic connector 4.

■４、Ｌｘは夫々０１．０２及び○０１．０１４の２本
分の幅に設定する。こうすることにより、液晶表示素子
１とフレキシブル基板２の端子位置合わせが正しく出来
ていれば、○□→異方性コネクタ→　　／■、→異方性
コネクタ→０２、及び○□３→異方性コネクタ→１□２
→異カ性コネクタ→０１４の回路が形成される。０工、
０２及び０．３．０１４間の抵抗値が５０Ω以下ならば
接続状態は正常と判定し、この値以上になった場合は、
相互の端子がずれているか、異方性コネクタの接続に問
題があるため再度位置合わせ、圧着をやりなおす。フレ
キシブル基板を異方性コネクタで接続する場合、フレキ
シブル基板の両端の接続信頼性が劣るため本実施例のよ
うにダミー端子を左右２カ所設ける。■4, Lx is set to the width of two lines, 01.02 and ○01.014, respectively. By doing this, if the terminal alignment between the liquid crystal display element 1 and the flexible substrate 2 is done correctly, ○□ → anisotropic connector → /■, → anisotropic connector → 02, and ○□3 → anisotropic Sex connector → 1□2
→Different connector →014 circuit is formed. 0 engineering,
If the resistance value between 02 and 0.3.014 is 50Ω or less, the connection status is determined to be normal, and if it exceeds this value,
Either the terminals are misaligned, or there is a problem with the connection of the anisotropic connector, so reposition and re-crimp. When connecting flexible substrates with anisotropic connectors, the connection reliability at both ends of the flexible substrate is poor, so dummy terminals are provided at two locations on the left and right as in this embodiment.

なお、第２図に示すように、従来の装置では、ダミー１
子１１．Ｌｘ、○□、０２、Ｏ１３、（＞１４は設けて
ない。従って、接続端子間の接続状態を定量的に推定す
ることなどは到底不可能である。In addition, as shown in Fig. 2, in the conventional device, dummy 1
Child 11. Lx, ○□, 02, O13, (>14) are not provided. Therefore, it is completely impossible to quantitatively estimate the connection state between the connection terminals.

［発明の効果］ 以上説明したように本発明によれば、接続状態を定量的
に判定することができるので、容易に正しい接続状態と
することが可能となり、信頼性の高い液晶表示装置が得
られる。[Effects of the Invention] As explained above, according to the present invention, since the connection state can be determined quantitatively, it is possible to easily establish the correct connection state, and a highly reliable liquid crystal display device can be obtained. It will be done.

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

第１図は本発明一実施例の平面図、第２図は従来の液晶
表示装置の液晶表示素子側とフレキシブルテープ側の接
続端子部の平面図、第３図は実施例や従来例の接続端子
接続部の側断面図である。 １・・・液晶表示素子、　　２・・・フレキシブル基板
、３　・ＩＣチップ、　４・・異方性コネクタ、　　■
、〜Ｉｉａ・・・液晶表示素子側の端子、　○、〜Ｏ１
４・・・第　　１　　図 第　　２　図 ｃ′−二Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a plan view of the connection terminals on the liquid crystal display element side and flexible tape side of a conventional liquid crystal display device, and Fig. 3 is a plan view of the connection of the embodiment and the conventional example. It is a side sectional view of a terminal connection part. 1... Liquid crystal display element, 2... Flexible board, 3 - IC chip, 4... Anisotropic connector, ■
, ~Iia... terminal on the liquid crystal display element side, ○, ~O1
4...Figure 1 Figure 2 Figure c'-2

Claims (1)

【特許請求の範囲】[Claims] １、液晶表示素子、液晶表示素子を駆動するためのＩＣ
チップを実装したフレキシブルテープ基板、これら両者
の接続端子間を電気的に接続する異方性コネクタ、及び
前記各部材を囲み相対位置を固定するフレームを備えた
液晶表示装置において、液晶表示素子とフレキシブルテ
ープ基板の夫々に、表示や駆動に必要な接続端子のほか
に、これら接続端子配列の延長部に、接続端子間の異方
性コネクタによる接続状態検査用のダミー端子を付加し
て配列し、異方性コネクタを前記必要な接続端子と共用
した前記ダミー端子間の接続状態を検査することにより
、前記必要な接続端子間の接続状態の良否を推定可能に
したことを特徴とする液晶表示装置。1. Liquid crystal display element, IC for driving the liquid crystal display element
In a liquid crystal display device that includes a flexible tape substrate on which a chip is mounted, an anisotropic connector that electrically connects the connecting terminals of these two, and a frame that surrounds each of the above members and fixes their relative positions, a liquid crystal display element and a flexible tape substrate are provided. In addition to the connection terminals necessary for display and driving on each tape board, dummy terminals are added and arranged on the extension of these connection terminal arrays for testing the connection status using anisotropic connectors between the connection terminals. A liquid crystal display device characterized in that it is possible to estimate the quality of the connection between the necessary connection terminals by inspecting the connection state between the dummy terminals that share an anisotropic connector with the necessary connection terminals. .
JP63058285A 1988-03-14 1988-03-14 Liquid crystal display Expired - Lifetime JP2650949B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP63058285A JP2650949B2 (en) 1988-03-14 1988-03-14 Liquid crystal display
KR1019890003074A KR890015057A (en) 1988-03-14 1989-03-13 LCD Display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63058285A JP2650949B2 (en) 1988-03-14 1988-03-14 Liquid crystal display

Publications (2)

Publication Number Publication Date
JPH01232326A true JPH01232326A (en) 1989-09-18
JP2650949B2 JP2650949B2 (en) 1997-09-10

Family

ID=13079925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63058285A Expired - Lifetime JP2650949B2 (en) 1988-03-14 1988-03-14 Liquid crystal display

Country Status (2)

Country Link
JP (1) JP2650949B2 (en)
KR (1) KR890015057A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0546033U (en) * 1991-11-19 1993-06-18 船井電機株式会社 Semiconductor mounting structure
JPH05346587A (en) * 1992-06-12 1993-12-27 Stanley Electric Co Ltd Liquid crystal display element
JP2002214639A (en) * 2001-11-12 2002-07-31 Seiko Epson Corp Liquid crystal display panel
JP2003149671A (en) * 2002-11-14 2003-05-21 Seiko Epson Corp Method for manufacturing liquid crystal panel
KR100461746B1 (en) * 1996-04-23 2005-04-06 소니 가부시끼 가이샤 Video display device
JP2006038988A (en) * 2004-07-23 2006-02-09 Seiko Epson Corp Electrooptical apparatus, electronic device and mounting structural body
EP1651015A1 (en) * 2004-10-25 2006-04-26 Seiko Epson Corporation Mounting structure for an electro-optical device
JP2008083138A (en) * 2006-09-26 2008-04-10 Matsushita Electric Ind Co Ltd Plasma display device
KR100924494B1 (en) * 2003-06-26 2009-11-03 엘지디스플레이 주식회사 TCP structure for output test on PCB

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3915927B2 (en) * 2004-11-18 2007-05-16 セイコーエプソン株式会社 Electronic component and manufacturing method thereof

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPH05346587A (en) * 1992-06-12 1993-12-27 Stanley Electric Co Ltd Liquid crystal display element
KR100461746B1 (en) * 1996-04-23 2005-04-06 소니 가부시끼 가이샤 Video display device
JP2002214639A (en) * 2001-11-12 2002-07-31 Seiko Epson Corp Liquid crystal display panel
JP2003149671A (en) * 2002-11-14 2003-05-21 Seiko Epson Corp Method for manufacturing liquid crystal panel
KR100924494B1 (en) * 2003-06-26 2009-11-03 엘지디스플레이 주식회사 TCP structure for output test on PCB
JP2006038988A (en) * 2004-07-23 2006-02-09 Seiko Epson Corp Electrooptical apparatus, electronic device and mounting structural body
US7245143B2 (en) 2004-07-23 2007-07-17 Seiko Epson Corporation Electro-optical device, electronic apparatus, and mounting structure
EP1651015A1 (en) * 2004-10-25 2006-04-26 Seiko Epson Corporation Mounting structure for an electro-optical device
US7115980B2 (en) 2004-10-25 2006-10-03 Seiko Epson Corporation Mounting structure, electro-optical device, and electronic apparatus
JP2008083138A (en) * 2006-09-26 2008-04-10 Matsushita Electric Ind Co Ltd Plasma display device

Also Published As

Publication number Publication date
JP2650949B2 (en) 1997-09-10
KR890015057A (en) 1989-10-28

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