JPH05346588A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH05346588A JPH05346588A JP15020092A JP15020092A JPH05346588A JP H05346588 A JPH05346588 A JP H05346588A JP 15020092 A JP15020092 A JP 15020092A JP 15020092 A JP15020092 A JP 15020092A JP H05346588 A JPH05346588 A JP H05346588A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display device
- crystal display
- glass substrate
- substrate
- 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
Links
Classifications
-
- 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
- H05K1/14—Structural association of two or more 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
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は液晶表示装置に関し、特
にマトリクス型液晶表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a matrix type liquid crystal display device.
【０００２】[0002]
【従来の技術】従来の液晶表示装置は、図４に示すよう
に、ガラス基板１の１辺に複数個、ドライバーＩＣの搭
載されたプリント基板２がその出力部４で接続，固定さ
れており、また、ガラス基板１の１辺に接続されたプリ
ント基板２は、全て、その入力リード５をドライバーＩ
Ｃを駆動するのに必要な信号を伝達する１つの接続基板
３に、半田付け等の手段により接続，固定されていた。2. Description of the Related Art In a conventional liquid crystal display device, as shown in FIG. 4, a plurality of printed circuit boards 2 each having a driver IC mounted on one side of a glass substrate 1 are connected and fixed at an output section 4 thereof. Also, all the printed circuit boards 2 connected to one side of the glass substrate 1 have their input leads 5 connected to the driver I.
It was connected and fixed to one connection board 3 which transmits a signal required to drive C by means such as soldering.
【０００３】[0003]
【発明が解決しようとする課題】この従来の液晶表示装
置では、ガラス基板に比べ接続基板の熱膨張係数が一般
に大きく、高温時及び低温時にガラス基板に対して接続
基板が伸び縮みする為、出力部がガラス基板に、かつ、
入力リードが接続基板にそれぞれ接続，固定されている
プリント基板にストレスが加えられる。このストレス
は、プリント基板の構造的に弱い部分、すなわち、入力
リードに集中し、図５（ａ），（ｂ）に示すように、高
温時及び低温時には、入力リード５の変形を生じ屈曲部
できれつを生じ断線する。In this conventional liquid crystal display device, the thermal expansion coefficient of the connecting substrate is generally larger than that of the glass substrate, and the connecting substrate expands and contracts with respect to the glass substrate at high temperature and low temperature. On the glass substrate, and
Stress is applied to the printed circuit board where the input leads are connected and fixed to the connection board, respectively. This stress concentrates on the structurally weak portion of the printed circuit board, that is, on the input lead, and as shown in FIGS. 5A and 5B, the input lead 5 is deformed at high temperature and low temperature, and the bent portion is generated. It creates a break and breaks the wire.
【０００４】入力リード５が断線すれば当然のことなが
らドライバーＩＣの動作が異常となり、液晶表示装置の
表示不良となり、また、場合によっては、ドライバーＩ
Ｃのラッチアップを引き起こし、焼損事故の原因となる
という問題点があった。If the input lead 5 is broken, the operation of the driver IC naturally becomes abnormal, the display of the liquid crystal display device becomes defective, and in some cases, the driver I
There is a problem that it causes a latch-up of C and causes a burnout accident.
【０００５】この問題点は、表示部が大型化され接続基
板の長さが長くなる程、また、温度変化の激しい環境で
使用される程多く発生する。This problem occurs more frequently as the display section becomes larger and the length of the connection board becomes longer, and as the display is used in an environment where the temperature changes drastically.
【０００６】本発明の目的は、入力リードの断線がな
く、ドライバーＩＣの動作異常による表示不良や焼損事
故の発生のない信頼性の高い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 highly reliable liquid crystal display device in which there is no disconnection of the input leads and there is no display failure or burnout accident due to an abnormal operation of the driver IC.
【０００７】[0007]
【課題を解決するための手段】本発明は、液晶パネルを
構成するガラス基板と、ドライバーＩＣが搭載され前記
ガラス基板の一辺に出力部が接続された複数のプリント
基板と、該プリント基板の入力リードに接続し前記ドラ
イバーＩＣの動作に必要な電源及び信号を伝達する接続
基板とを有する液晶表示装置において、前記ガラス基板
の一辺に配置された前記接続基板が少くとも１ケ所分断
されている。According to the present invention, there are provided a glass substrate which constitutes a liquid crystal panel, a plurality of printed boards on which driver ICs are mounted and an output section is connected to one side of the glass substrate, and inputs of the printed boards. In a liquid crystal display device having a connection substrate connected to leads and transmitting a power source and a signal required for the operation of the driver IC, the connection substrate arranged on one side of the glass substrate is divided at least at one place.
【０００８】[0008]
【実施例】次に、本発明の実施例について図面を参照し
て説明する。Embodiments of the present invention will now be described with reference to the drawings.
【０００９】図１は本発明の第１の実施例の要部平面図
である。FIG. 1 is a plan view of an essential part of a first embodiment of the present invention.
【００１０】第１の実施例は、図１に示すように、図４
に示す従来の液晶表示装置と同様、プリント基板２の出
力部４をガラス基板１に、入力リード５を接続基板３に
それぞれ接続，固定しているが、接続基板３は接続基板
Ａ３−１と接続基板Ｂ３−２の２つに分断部６で分断さ
れ、それぞれに信号入力がなされている。In the first embodiment, as shown in FIG.
Similar to the conventional liquid crystal display device shown in FIG. 2, the output portion 4 of the printed board 2 is connected to the glass substrate 1 and the input lead 5 is connected and fixed to the connection board 3, respectively. The connection board 3 is connected to the connection board A3-1. The connection board B3-2 is divided into two by the division unit 6, and a signal is input to each.
【００１１】例えば、対角１３インチの表示部を有する
液晶表示装値の場合を例にすると、接続基板３の長さは
約２６０ｍｍを必用とする。また、ガラス基板１及び接
続基板３の熱膨張係数は、一般に、それぞれ、１．０×
１０-6／℃，２．０×１０-5／℃程度である。液晶表示
装置の保管温度範囲を−２０℃〜４０℃とし、使用時は
内部熱上昇分（約１５℃上昇）があるので熱ストレスと
しては、−２０〜５５℃を想定する必要がある。従来の
場合、ガラス基板１に対する接続基板３の伸縮量は、 （５５＋２０）×（２．０×１０-5−１．０×１０-6）
×２６０＝０．３８ｍｍ となるが、第１の実施例の場合は、接続基板Ａ３−１と
接続基板Ｂ３−２に分断部６で２つに分断しており、伸
縮量を１／２とすることができる為入力リード５の変形
量を少くすることが可能であり、入力リード５のうける
ストレスも低減できる。また、分断箇所を２ケ所，３ケ
所と増すことにより、接続基板の伸縮量も１／３，１／
４と減らすことが可能となる。For example, in the case of a liquid crystal display device having a display unit with a diagonal of 13 inches, the length of the connecting substrate 3 needs to be about 260 mm. Further, the thermal expansion coefficients of the glass substrate 1 and the connection substrate 3 are generally 1.0 ×, respectively.
It is about 10 −6 / ° C. and about 2.0 × 10 −5 / ° C. The storage temperature range of the liquid crystal display device is set to -20 ° C to 40 ° C, and since there is an internal heat increase (about 15 ° C increase) during use, it is necessary to assume a heat stress of -20 to 55 ° C. In the conventional case, the expansion / contraction amount of the connection substrate 3 with respect to the glass substrate 1 is (55 + 20) × (2.0 × 10 −5 −1.0 × 10 −6 ).
However, in the case of the first embodiment, the connection board A3-1 and the connection board B3-2 are divided into two by the dividing portion 6, and the expansion / contraction amount is halved. Therefore, the amount of deformation of the input lead 5 can be reduced, and the stress applied to the input lead 5 can be reduced. In addition, by increasing the number of divisions to 2 and 3, the expansion and contraction amount of the connection board can be reduced to 1/3 and 1 /.
It can be reduced to 4.
【００１２】図２は本発明の第２の実施例の要部平面
図、図３は図２の接続基板の断面図である。FIG. 2 is a plan view of an essential part of a second embodiment of the present invention, and FIG. 3 is a sectional view of the connection board of FIG.
【００１３】図２の実施例は、図２及び図３に示すよう
に、第１の実施例と同様接続基板３は分断されている
が、分断された接続基板Ａ３−１と接続基板Ｂ３−２が
分断部６で左右方向に伸び縮み可能なジャンパー基板７
により半田８を介して電気的に接続されている。In the embodiment of FIG. 2, as shown in FIGS. 2 and 3, the connection board 3 is divided as in the first embodiment, but the connection boards A3-1 and B3- are divided. 2 is a jumper board 7 that can be expanded and contracted in the left-right direction at the dividing portion 6.
Are electrically connected via the solder 8.
【００１４】第２の実施例は第１の実施例に比べ、分断
された接続基板それぞれへの信号入力が１箇所でよく、
構造上も簡単で組み立ても容易になるという利点を有す
る。Compared to the first embodiment, the second embodiment requires only one signal input to each divided connection board,
It has the advantages of simple structure and easy assembly.
【００１５】[0015]
【発明の効果】以上説明したように本発明は、接続基板
を分断しているのでプリント基板の入力リードの変形を
１／２，１／３・・・と分断箇所数により小さくするこ
とができ、入力リードのうけるストレスも低減可能で、
温度変化の激しい環境での使用及び表示面積の大型化等
に対応して、表示不良の発生のない信頼性の高い液晶表
示装置を提供できる効果がある。As described above, according to the present invention, since the connection board is divided, the deformation of the input lead of the printed board can be reduced to 1/2, 1/3, ... , Stress on the input leads can be reduced,
There is an effect that it is possible to provide a highly reliable liquid crystal display device that does not cause display defects in response to use in an environment where the temperature changes drastically and increase in display area.
【図１】本発明の第１の実施例の要部平面図である。FIG. 1 is a plan view of an essential part of a first embodiment of the present invention.
【図２】本発明の第２の実施例の要部平面図である。FIG. 2 is a main part plan view of a second embodiment of the present invention.
【図３】図２の接続基板の断面図である。3 is a cross-sectional view of the connection board of FIG.
【図４】従来の液晶表示装置の一例の要部平面図であ
る。FIG. 4 is a plan view of a main part of an example of a conventional liquid crystal display device.
【図５】図４Ａ部の高温時及び低温時の入力リードの変
形状態を示す平面図である。5 is a plan view showing a deformed state of the input lead of FIG. 4A at a high temperature and a low temperature.
１ ガラス基板 ２ プリント基板 ３ 接続基板 ３−１ 接続基板Ａ ３−２ 接続基板Ｂ ４ 出力部 ５ 入力リード ６ 分断部 ７ ジャンパー基板 ８ 半田 DESCRIPTION OF SYMBOLS 1 Glass substrate 2 Printed circuit board 3 Connection board 3-1 Connection board A 3-2 Connection board B 4 Output part 5 Input lead 6 Dividing part 7 Jumper board 8 Solder
Claims (2)
ライバーＩＣが搭載され前記ガラス基板の一辺に出力部
が接続された複数のプリント基板と、該プリント基板の
入力リードに接続し前記ドライバーＩＣの動作に必要な
電源及び信号を伝達する接続基板とを有する液晶表示装
置において、前記ガラス基板の一辺に配置された前記接
続基板が少くとも１ケ所分断されていることを特徴とす
る液晶表示装置。1. A glass substrate constituting a liquid crystal panel, a plurality of printed boards on which a driver IC is mounted and an output section is connected to one side of the glass substrate, and the driver ICs connected to input leads of the printed board. A liquid crystal display device having a connection substrate for transmitting power and signals necessary for operation, wherein the connection substrate arranged on one side of the glass substrate is divided at least at one place.
的に柔軟な構造と材質とのうちのいずれか一方を有する
基板で電気的に接続されていることを特徴とする請求項
１記載の液晶表示装置。2. The divided connection board is electrically connected by a board having one of a mechanically flexible structure and a material at the cutting part. Liquid crystal display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4150200A JP2814840B2 (en) | 1992-06-10 | 1992-06-10 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4150200A JP2814840B2 (en) | 1992-06-10 | 1992-06-10 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05346588A true JPH05346588A (en) | 1993-12-27 |
| JP2814840B2 JP2814840B2 (en) | 1998-10-27 |
Family
ID=15491710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4150200A Expired - Lifetime JP2814840B2 (en) | 1992-06-10 | 1992-06-10 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2814840B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04107497A (en) * | 1990-08-28 | 1992-04-08 | Seiko Epson Corp | Liquid crystal display device |
| JPH04155314A (en) * | 1990-10-18 | 1992-05-28 | Mitsubishi Electric Corp | Matrix display device |
-
1992
- 1992-06-10 JP JP4150200A patent/JP2814840B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04107497A (en) * | 1990-08-28 | 1992-04-08 | Seiko Epson Corp | Liquid crystal display device |
| JPH04155314A (en) * | 1990-10-18 | 1992-05-28 | Mitsubishi Electric Corp | Matrix display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2814840B2 (en) | 1998-10-27 |
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