JPH0153796B2 - - Google Patents
Info
- Publication number
- JPH0153796B2 JPH0153796B2 JP57122402A JP12240282A JPH0153796B2 JP H0153796 B2 JPH0153796 B2 JP H0153796B2 JP 57122402 A JP57122402 A JP 57122402A JP 12240282 A JP12240282 A JP 12240282A JP H0153796 B2 JPH0153796 B2 JP H0153796B2
- Authority
- JP
- Japan
- Prior art keywords
- wiring board
- liquid crystal
- wiring
- crystal panel
- electrodes
- 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.)
- Expired
Links
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】
本発明は直交する帯状電極群から成るマトリツ
クス電極構造を持つ液晶表示装置の様な高密度精
報表示装置に関し、特に、液晶表示パネルの電極
端子接続方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-density precision display device such as a liquid crystal display device having a matrix electrode structure consisting of a group of orthogonal band-shaped electrodes, and in particular to a method for connecting electrode terminals of a liquid crystal display panel. .
マトリツクス型液晶表示装置は、行数が多い程
表示密度が高くなり表示品位は向上するが、行数
（走査ライン数）が多くなれば１行に信号が印加
される時間即ちデユーテイが小さくなり、またク
ロストークに対するマージンが減少してくる。特
に表示媒体として用いられる液晶の透過率―電圧
特性が急峻でない、レスポンス（応答速度）が遅
いといつた理由から充分なコントラストが得られ
にくい。これらの問題を解決するためには次のよ
うな方策が提案されている。(1)閾値の明瞭な印加
電圧対光透過率特性を持つ液晶材料の開発。(2)マ
トリツクスアドレス方式を最適化することにより
駆動マージン（α＝Von／Voff）を大きくする。
(3)電極構造を工夫して見かけ上の分解能を高め
る。例えば、第１図Ａに示すように信号側電極を
上側Y1，Y2，…，Yoと下側Y′1，Y′2，…，Y′o
に分割し、走査側電極X1，X2，…，Xnを上側信
号側電極及び下側信号側電極と共通にするかまた
は第１図Ｂに示すように１つの走査側電極Xiに
対して隣接する信号側電極Yj，Yj＋１をくし歯
状に入り込ませる。あるいは第２図に示す如く複
数の液晶パネルを重ね合わせ、ガラス基板１のセ
ル内面に行電極２と列電極３を各セル毎に上下分
割して配置し、それぞれ個別に駆動する方式があ
る。上記(1)及び(2)の方式は液晶パネルの構造を変
える必要はないが、飛躍的に駆動可能なライン数
を増加することは期待できない。それに対し、(3)
の方式は、液晶パネルの構造が複雑になる反面、
駆動可能なライン数を確実に２倍、22倍…と増加
させることができる。(3)の方式では駆動可能なラ
イン数を大幅に増やすことができるが、信号側電
極の端子電極も２倍、22倍、…と増加する。(3)の
方式を採用した場合、極端に端子数が増加するが
この端子処理方式の一列として、液晶駆動回路素
子を塔載した配線基板の縁部を折り曲げ異方導電
性ゴムを用いて端子が連設された液晶パネルとの
電気的接続を行なう方式がある。この方式は第３
図に示す如く、ガラス基板１で液晶セルを構成す
るとともにセル内面に信号側電極４と走査側電極
５を配設し、液晶６を両電極４，５間に介設して
セル周縁をシール材７で封止することにより液晶
パネルを形成し、液晶パネル外部のガラス基板１
面にそれぞれ上記両電極４，５の端子を延設して
異方導電性ゴム（エラストマー）８を介設しコネ
クタ９で駆動回路の具設された配線基板１０の端
部を電気的及び機械的に連結したものである。こ
の方式では、回路素子１１を搭載した配線基板１
０に接続される走査側電極５が配線基板１０の下
に設けられており、液晶パネル１と配線基板１０
との間に異方導電性ゴム８を挿入するのが非常に
厄介であつた。また多ラインから成るマトリツク
ス液晶パネルでは転移用材料を用いて一方の基板
に電極を転移するのは困難であり、別々の基板の
対向する面上に端子電極が設けられているためこ
の方式では走査側電極５での液晶パネルと配線基
板間の機械的な固定が困難となる。本発明は上述
の問題を解決した新規有用なマトリツクス表示装
置の端子処理方式を提供することを目的とするも
のである。 In a matrix type liquid crystal display device, the larger the number of lines, the higher the display density and the better the display quality.However, as the number of lines (number of scanning lines) increases, the time for applying a signal to one line, that is, the duty, decreases. Also, the margin for crosstalk decreases. In particular, it is difficult to obtain sufficient contrast because the transmittance-voltage characteristics of liquid crystals used as display media are not steep and the response (response speed) is slow. The following measures have been proposed to solve these problems. (1) Development of liquid crystal materials with applied voltage vs. light transmittance characteristics with clear threshold values. (2) Increase the drive margin (α=Von/Voff) by optimizing the matrix addressing method.
(3) Improve the apparent resolution by improving the electrode structure. For example, as shown in FIG. 1A, the signal side electrodes are arranged on the upper side Y 1 , Y 2 , ..., Yo and the lower side Y' 1 , Y' 2 , ..., Y' o
The scanning side electrodes X 1 , X 2 , ... , Then, the adjacent signal side electrodes Y j and Y j +1 are inserted in a comb-like shape. Alternatively, as shown in FIG. 2, there is a method in which a plurality of liquid crystal panels are stacked one on top of the other, row electrodes 2 and column electrodes 3 are arranged on the inner surface of the cells of the glass substrate 1 in a vertically divided manner for each cell, and each is driven individually. Although the methods (1) and (2) above do not require changing the structure of the liquid crystal panel, they cannot be expected to dramatically increase the number of lines that can be driven. On the other hand, (3)
Although this method makes the structure of the liquid crystal panel more complicated,
It is possible to reliably increase the number of lines that can be driven by 2 times, 2 times, etc. In method (3), the number of lines that can be driven can be greatly increased, but the terminal electrodes of the signal side electrodes also increase by 2 times, 2 times, and so on. When method (3) is adopted, the number of terminals increases dramatically, but as a part of this terminal processing method, the edge of the wiring board on which the liquid crystal drive circuit element is mounted is bent and the terminals are made using anisotropically conductive rubber. There is a method for making electrical connection with a liquid crystal panel that is connected in series. This method is the third
As shown in the figure, a liquid crystal cell is constructed using a glass substrate 1, and a signal side electrode 4 and a scanning side electrode 5 are arranged on the inner surface of the cell, and a liquid crystal 6 is interposed between both electrodes 4 and 5 to seal the cell periphery. A liquid crystal panel is formed by sealing with the material 7, and a glass substrate 1 outside the liquid crystal panel is sealed.
Terminals of the electrodes 4 and 5 are respectively extended on the surface, an anisotropically conductive rubber (elastomer) 8 is interposed, and a connector 9 connects the end of the wiring board 10 on which the drive circuit is installed electrically and mechanically. It is connected to each other. In this method, a wiring board 1 on which a circuit element 11 is mounted
0 is provided under the wiring board 10, and the scanning side electrode 5 connected to the wiring board 10 is connected to the liquid crystal panel 1 and the wiring board 10.
It was very troublesome to insert the anisotropically conductive rubber 8 between the two. In addition, in a matrix liquid crystal panel consisting of multiple lines, it is difficult to transfer electrodes to one substrate using a transfer material, and since the terminal electrodes are provided on opposing surfaces of separate substrates, this method does not allow scanning. This makes it difficult to mechanically fix the liquid crystal panel and the wiring board using the side electrodes 5. An object of the present invention is to provide a novel and useful terminal processing method for a matrix display device that solves the above-mentioned problems.
以下本発明を実施例に従つて図面を参照しなが
ら詳説する。第４図乃至第７図はそれぞれ本発明
の１実施例を示す液晶パネルと配線基板間の端子
接続方式の構成図である。図中第３図と同一符号
は同一内容を示す。 Hereinafter, the present invention will be explained in detail according to embodiments with reference to the drawings. FIGS. 4 to 7 are configuration diagrams of a terminal connection system between a liquid crystal panel and a wiring board, each showing an embodiment of the present invention. In the figure, the same symbols as in FIG. 3 indicate the same contents.
走査側電極および信号側電極のいずれか一方は
従来同様に異方導電性を有する導電性ゴムを用い
て液晶パネルと配線基板間で電気的に接続する
が、残る一方の端子処理はフレキシブル配線シー
トを用いて電気的に接続する。各実施例は特に、
走査側電極の端子処理にフレキシブル配線シート
を用いる場合について説明する。 Either the scanning side electrode or the signal side electrode is electrically connected between the liquid crystal panel and the wiring board using conductive rubber with anisotropic conductivity as in the past, but the remaining terminal is processed using a flexible wiring sheet. Connect electrically using In particular, each example
A case will be described in which a flexible wiring sheet is used for terminal processing of scanning side electrodes.
第４図に示す方式は、液晶パネル側の端子電極
がガラス基板の上面に、また配線基板側の端子電
極が基板の上面に露呈していることから両面スル
ホールのフレキシブル配線シート１２を利用した
ものである。この方式は両面スルホールを施した
フレキシブル配線シート１２が高価であり、コス
トが高くなるという欠点がある。また、走査側電
極の端子ピツチが非常に細かくなつた場合、フレ
キシブル配線シート１２にスルホールが形成でき
ないという問題が起る。そのために片面にのみ電
極が形成されたコストが比較的安いフレキシブル
配線シート１３を用いて液晶パネル及び配線基板
との接続を改良した実施例が第５図に示す接続方
式である。また第６図に示す実施例は配線基板の
走査側電極が設けられている縁部を、信号側と同
様に液晶パネルに近接する方向へ折り曲げ、液晶
パネルの走査側電極とほぼ同じ高さで再び外側へ
折り曲げその配線基板の縁部と液晶パネルとをフ
レキシブル配線シート１３を用いて接続する方式
である。第７図に示す実施例は配線基板の縁部を
液晶パネルに近接する方向へ折り曲げた状態でフ
レキシブル配線シート１３と接続する方式であ
る。フレキシブル配線シート１２，１３の材料と
しては、カーボンあるいは銀などをフエノール樹
脂等の熱可塑性樹脂中に含有させたものを導電材
料として用い、スクリーン印刷法によりポリエス
テルフイルム上に印刷した配線シート（以下熱圧
着配線シートと称す）がある。この配線シートは
熱可塑性樹脂から成るため接着する部分を約180
℃の温度で加熱すると同時に加圧することにより
ガラス基板あるいは配線基板などに容易に接着で
きる。他の材料としては、非常に耐熱性に優れた
ポリイミドフイルム上に設けられた銅箔をホトエ
ツチングにより形成した配線シート（以下ポリイ
ミド配線シートと称す）がある。この配線シート
の場合、半田によりガラス基板及び配線基板に接
続することができる。上記、２種のフレキシブル
配線シートとガラス基板および配線基板との具体
的な接続方法について説明する。まず、熱圧着配
線シートの場合、第８図に示すように加熱したヘ
ツド１４を圧縮空気により押し下げ熱圧着する部
分を加熱、加圧する。最初に液晶パネルとの接続
を行なつた後、配線基板との接続を行なう。第６
図に示す実施例では接続する部分がほぼ同一高さ
にあることから、液晶パネルと配線基板との間に
適当な厚さのスペーサを設けておくことにより両
者を同時に接続することも可能である。次にポリ
イミド配線シートの場合、第９図に示すように光
源１５からレンズ１６を介して赤外線照射により
半田を溶融させ、液晶パネルとポリイミド配線シ
ートとを先に接続する。その後、配線基板との接
続を行なう。以上、詳説した如く液晶パネルを駆
動する回路部が構成された配線基板の縁部を液晶
パネル側へ折り曲げ、導電異方性を有する導電性
ゴムとフレキシブル配線シートを用いることによ
り、液晶パネルと配線基板が一体的に結合され、
特に困難な製造技術を必要とすることなく空間を
充分に利用した小型、薄型のマトリツクス表示装
置を得ることができる。 The method shown in FIG. 4 uses a flexible wiring sheet 12 with through-holes on both sides, since the terminal electrodes on the liquid crystal panel side are exposed on the top surface of the glass substrate, and the terminal electrodes on the wiring board side are exposed on the top surface of the substrate. It is. This method has the disadvantage that the flexible wiring sheet 12 with through holes on both sides is expensive, increasing the cost. Further, if the terminal pitch of the scanning side electrodes becomes very fine, a problem arises in that through holes cannot be formed in the flexible wiring sheet 12. For this reason, the connection method shown in FIG. 5 is an embodiment in which the connection between the liquid crystal panel and the wiring board is improved by using a relatively inexpensive flexible wiring sheet 13 having electrodes formed on only one side. In addition, in the embodiment shown in FIG. 6, the edge of the wiring board on which the scanning side electrode is provided is bent in the direction closer to the liquid crystal panel in the same way as the signal side, so that it is at almost the same height as the scanning side electrode of the liquid crystal panel. In this method, the wiring board is bent outward again and the edge of the wiring board is connected to the liquid crystal panel using a flexible wiring sheet 13. The embodiment shown in FIG. 7 is a method in which the edge of the wiring board is bent in the direction closer to the liquid crystal panel and then connected to the flexible wiring sheet 13. The flexible wiring sheets 12 and 13 are made of a conductive material containing carbon or silver in a thermoplastic resin such as a phenol resin, and are printed on a polyester film using a screen printing method (hereinafter referred to as a thermal wiring sheet). (referred to as crimp wiring sheet). This wiring sheet is made of thermoplastic resin, so the area to be glued is approximately 180 mm.
It can be easily bonded to glass substrates, wiring boards, etc. by heating at a temperature of °C and applying pressure at the same time. Another material is a wiring sheet (hereinafter referred to as a polyimide wiring sheet) which is formed by photo-etching a copper foil provided on a polyimide film which has excellent heat resistance. In the case of this wiring sheet, it can be connected to the glass substrate and the wiring board by soldering. A specific method of connecting the above two types of flexible wiring sheets to the glass substrate and the wiring board will be explained. First, in the case of a thermocompression bonded wiring sheet, as shown in FIG. 8, the heated head 14 is pressed down with compressed air, and the portion to be thermocompression bonded is heated and pressurized. First, connection is made to the liquid crystal panel, and then connection is made to the wiring board. 6th
In the example shown in the figure, the parts to be connected are at almost the same height, so by providing a spacer of an appropriate thickness between the liquid crystal panel and the wiring board, it is possible to connect both at the same time. . Next, in the case of a polyimide wiring sheet, as shown in FIG. 9, the liquid crystal panel and the polyimide wiring sheet are first connected by melting the solder by irradiating infrared light from a light source 15 through a lens 16. After that, connection to the wiring board is made. As explained in detail above, by bending the edge of the wiring board on which the circuit section for driving the liquid crystal panel is constructed toward the liquid crystal panel side and using conductive rubber having conductive anisotropy and a flexible wiring sheet, the liquid crystal panel and the wiring can be connected. The substrates are integrally combined,
A small, thin matrix display device that fully utilizes space can be obtained without requiring any particularly difficult manufacturing technology.
第１図Ａ，Ｂ及び第２図は従来のマトリツクス
電極構造液晶表示装置の電極構成図である。第３
図は液晶パネルと配線基板の接続構造を説明する
構成図である。第４図、第５図、第６図及び第７
図はそれぞれ本発明の１実施例を示す端子接続部
の構成図である。第８図は熱圧着配線シートの接
続方法を説明する説明図である。第９図はポリイ
ミド配線シートの接続方法を説明する説明図であ
る。
１…ガラス基板、４…信号側電極、５…走査側
電極、６…液晶層、８…導電異方性ゴム、９…コ
ネクタ、１０…配線基板、１２，１３…フレキシ
ブル配線シート。
FIGS. 1A and 1B and FIG. 2 are electrode configuration diagrams of a conventional matrix electrode structure liquid crystal display device. Third
The figure is a configuration diagram illustrating a connection structure between a liquid crystal panel and a wiring board. Figures 4, 5, 6 and 7
Each figure is a configuration diagram of a terminal connection section showing one embodiment of the present invention. FIG. 8 is an explanatory diagram illustrating a method of connecting thermocompression wiring sheets. FIG. 9 is an explanatory diagram illustrating a method of connecting polyimide wiring sheets. DESCRIPTION OF SYMBOLS 1... Glass substrate, 4... Signal side electrode, 5... Scanning side electrode, 6... Liquid crystal layer, 8... Conductive anisotropic rubber, 9... Connector, 10... Wiring board, 12, 13... Flexible wiring sheet.
Claims (1)
にＸ方向の電極が、他方の基板の対向面にＹ方向
の電極が形成されたマトリツクス型表示パネル
と、該表示パネルを駆動する駆動回路が具設され
た配線基板とを備え、 前記配線基板の１組の対辺縁部が前記表示パネ
ルに近接する方向へ折り曲げられて、前記配線基
板の１組の対辺周縁に備わる駆動回路の接続配線
が、前記Ｘ方向の電極と異方導電性ゴムを介して
電気的に接続され、 前記配線基板の他の１組の対辺周縁に備わる駆
動回路の接続配線が、フレキシブル配線シートを
介して前記Ｙ方向の電極と電気的に接続されたこ
とを特徴とするマトリツクス表示装置の端子処理
方式。[Scope of Claims] 1. A matrix display panel in which two substrates are opposed, an electrode in the X direction is formed on the opposing surface of one substrate, and an electrode in the Y direction is formed on the opposing surface of the other substrate; a wiring board provided with a driving circuit for driving a display panel, one set of opposite edges of the wiring board is bent in a direction approaching the display panel, and one set of opposite edges of the wiring board is bent in a direction approaching the display panel. The drive circuit connection wiring provided on the wiring board is electrically connected to the electrode in the X direction via anisotropically conductive rubber, and the drive circuit connection wiring provided on the periphery of the other pair of opposite sides of the wiring board is flexible. A terminal processing method for a matrix display device, characterized in that the terminals are electrically connected to the electrodes in the Y direction via a wiring sheet.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57122402A JPS5912483A (en) | 1982-07-13 | 1982-07-13 | Terminal processing system for matrix display unit |
| GB08318783A GB2124010B (en) | 1982-07-13 | 1983-07-12 | Structure and method of connecting terminals of matrix display units |
| DE19833325315 DE3325315A1 (en) | 1982-07-13 | 1983-07-13 | MATRIX DISPLAY |
| GB8514198A GB2162354A (en) | 1982-07-13 | 1985-06-05 | Matrix display units |
| US06/803,522 US4690510A (en) | 1982-07-13 | 1985-12-02 | Structure and method of connecting terminals of matrix display units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57122402A JPS5912483A (en) | 1982-07-13 | 1982-07-13 | Terminal processing system for matrix display unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5912483A JPS5912483A (en) | 1984-01-23 |
| JPH0153796B2 true JPH0153796B2 (en) | 1989-11-15 |
Family
ID=14834901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57122402A Granted JPS5912483A (en) | 1982-07-13 | 1982-07-13 | Terminal processing system for matrix display unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5912483A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60213508A (en) * | 1984-04-05 | 1985-10-25 | Sumitomo Rubber Ind Ltd | Core of safety tyre |
| JPS60233684A (en) * | 1984-05-07 | 1985-11-20 | スタンレー電気株式会社 | Laminate type lcd device |
| JPS61165524U (en) * | 1985-04-01 | 1986-10-14 | ||
| JPS6261089A (en) * | 1985-09-11 | 1987-03-17 | シャープ株式会社 | Planar display unit |
| JPH0320385U (en) * | 1989-07-07 | 1991-02-27 | ||
| WO1997001791A1 (en) * | 1995-06-29 | 1997-01-16 | Philips Electronics N.V. | Display device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56142577A (en) * | 1980-04-09 | 1981-11-06 | Hitachi Ltd | Liquid crystal display unit |
| JPS5714175U (en) * | 1980-06-27 | 1982-01-25 |
-
1982
- 1982-07-13 JP JP57122402A patent/JPS5912483A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5912483A (en) | 1984-01-23 |
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