JPH01248133A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPH01248133A
JPH01248133A JP7770588A JP7770588A JPH01248133A JP H01248133 A JPH01248133 A JP H01248133A JP 7770588 A JP7770588 A JP 7770588A JP 7770588 A JP7770588 A JP 7770588A JP H01248133 A JPH01248133 A JP H01248133A
Authority
JP
Japan
Prior art keywords
liquid crystal
circuit board
signal side
side circuit
crystal display
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
JP7770588A
Other languages
Japanese (ja)
Inventor
Kenya Yokoi
研哉 横井
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7770588A priority Critical patent/JPH01248133A/en
Publication of JPH01248133A publication Critical patent/JPH01248133A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/14Structural association of two or more printed circuits

Abstract

PURPOSE:To decrease the number of parts, connecting points, etc., for driving circuits and to provide manpower lessening, etc., in a connecting operation, etc., at a low cost by directly connecting the electrode parts of a data signal side circuit board and a scanning signal side circuit board. CONSTITUTION:A liquid crystal display cell 23 having an upper liquid crystal cell substrate 21, a lower liquid crystal cell substrate 22, etc., is provided. The electrode parts 27, 28 of the data signal side circuit board 25 and the scanning signal side circuit board 26 are directly connected while two kinds of the data signal side circuit board and scanning signal side circuit board are held positioned and connected to the liquid crystal display cell 23 in this case. The circuit boards are thereby easily connected with the lessened manpower at the smaller number of parts in the state of allowing the cost reduction without using flexible connectors, etc.

Description

【発明の詳細な説明】 技術分野 本発明は、液晶表示装置に関する。[Detailed description of the invention] Technical field The present invention relates to a liquid crystal display device.

従来技術 従来、反射型デイスプレィとして用いられていた液晶表
示装置は、最近の高容量化に伴い大型化され、均一な反
射を得ることが難しくなっている。
BACKGROUND ART Liquid crystal display devices that have been conventionally used as reflective displays have recently become larger due to the increase in capacity, making it difficult to obtain uniform reflection.

また、より明るい表示が要求されることからバックライ
トが用いられたり、カラー化によってもバックライトが
用いられている。また、○HP(オーバ・ヘッド・プロ
ジェクタ)等の投映装置への応用も行なわれており、透
過型液晶表示装置として使われるようになってきている
In addition, backlights are used because brighter display is required, and backlights are also used for colorization. Furthermore, it has been applied to projection devices such as ○HP (over head projector), and has come to be used as a transmissive liquid crystal display device.

この時、液晶表示セル駆動用の回路基板の取付け・接続
等を第2図により説明する。まず、液晶セル上基板1や
液晶セル下基板2を備えた液晶表示セル3が設けられて
いる。このような液晶表示セル3に対し、駆動回路基板
として、液晶駆動用LSI4等を搭載したデータ信号側
回路基板5や走査信号側回路基Fi6が取付けられ接続
されるものである。まず、これらの回路基板5,6は液
晶表示セル3の周辺部に配置され、データ信号側回路基
板5及び走査信号側回路基板6は液晶表示セル3の取出
し電極部7に対し各々の接続用電極部8.9を介して個
々に接続されるにの後、これらの回路基板5.6の駆動
回路用信号電極部10゜11間を別個に設けたフレキシ
ブルコネクタ12(例えばフレキシブルプリントやフラ
ットケーブル)により接続するようにしている。13は
コントローラ側に対する接続用のコネクタである。
At this time, the installation, connection, etc. of the circuit board for driving the liquid crystal display cell will be explained with reference to FIG. First, a liquid crystal display cell 3 including a liquid crystal cell upper substrate 1 and a liquid crystal cell lower substrate 2 is provided. To such a liquid crystal display cell 3, a data signal side circuit board 5 and a scanning signal side circuit board Fi6 mounted with a liquid crystal driving LSI 4 and the like are attached and connected as drive circuit boards. First, these circuit boards 5 and 6 are arranged around the liquid crystal display cell 3, and the data signal side circuit board 5 and the scanning signal side circuit board 6 are connected to the extraction electrode part 7 of the liquid crystal display cell 3. After being individually connected via the electrode portions 8.9, a flexible connector 12 (for example, a flexible printed cable or a flat cable ). 13 is a connector for connection to the controller side.

このようにして2分された回路基板5,6方式とするの
は、液晶表示セル3の上・下基板1,2の貼り合せにお
ける相対位置の精度が悪く、一体化された駆動回路基板
として構成したのではアライメントが困難だからである
The reason why the circuit boards 5 and 6 are divided into two parts is because the accuracy of the relative position in bonding the upper and lower boards 1 and 2 of the liquid crystal display cell 3 is poor, so the integrated driving circuit board This is because alignment is difficult if the configuration is configured.

しかし、このような駆動回路基板の接続等の方式では、
部品点数が多くコストアップとなり、接続の作業性等も
悪いものとなっている。
However, with this method of connecting the drive circuit board,
The large number of parts increases costs, and the workability of connections is also poor.

目的 本発明は、このような点に鑑みなされたもので、駆動回
路用の部品点数、接続個所等を減少させて低コストで接
続作業等の省力化等を図ることができる液晶表示装置を
得ることを目的とする。
Purpose The present invention has been made in view of the above points, and provides a liquid crystal display device that can reduce the number of parts for a drive circuit, the number of connection points, etc., and save labor for connection work etc. at low cost. The purpose is to

構成 本発明は、上記目的を達成するため、液晶表示セルの取
出し電極部と、前記液晶表示セル用のデータ信号側回路
基板及び走査信号側回路基板の接続用電極部とを位置決
め配置させて接続した状態で、前記データ信号側回路基
板と走査信号側回路基板との電極部を直接的に接続した
ことを特徴とする。
Structure In order to achieve the above object, the present invention positions and connects an extraction electrode portion of a liquid crystal display cell and a connecting electrode portion of a data signal side circuit board and a scanning signal side circuit board for the liquid crystal display cell. In this state, the electrode portions of the data signal side circuit board and the scanning signal side circuit board are directly connected.

以下、本発明の一実施例を第1図に基づいて説明する。An embodiment of the present invention will be described below with reference to FIG.

まず、液晶セル上基板21、液晶セル下基板22等を備
えた液晶表示セル23が設けられている。このような液
晶表示セル23に対し液晶駆動用回路基板として各々液
晶駆動用LS I 24等を搭載したデータ信号側回路
基板25と走査信号側回路基板26とを分離させて位置
決め接続し、その後でこれらの回路基板25.26の駆
動回路用電極部27.28同士を直接的に接続するよう
にしたものである。
First, a liquid crystal display cell 23 including a liquid crystal cell upper substrate 21, a liquid crystal cell lower substrate 22, etc. is provided. For such a liquid crystal display cell 23, a data signal side circuit board 25 and a scanning signal side circuit board 26, each of which has a liquid crystal driving circuit board such as an LSI 24 mounted thereon, are separated and connected in position. The drive circuit electrode portions 27 and 28 of these circuit boards 25 and 26 are directly connected to each other.

より具体的には、液晶表示セル23のデータ信号側取出
し電極部29の外部に設けたアライメントマーク30と
、データ信号側回路基板25の接続用電極部31の外部
に設けたアライメントマーク32とが一致するように位
置決めして異方性導電ゴム又は異方性導電膜(例えば、
前者としてはぜブラゴム、後者としてはヒートシールコ
ネクタ)により、電極部29.31間を接続する。液晶
表示セル23の走査信号側取出し電極部33と走査信号
側回路基板26の接続用電極部34についても同様に各
々のアライメントマーク35.36により位置決めアラ
イメントさせた状態で両者間を異方性導電ゴム又は異方
性導電膜により接続する。
More specifically, an alignment mark 30 provided on the outside of the data signal side extraction electrode portion 29 of the liquid crystal display cell 23 and an alignment mark 32 provided on the outside of the connection electrode portion 31 of the data signal side circuit board 25 are Position the anisotropic conductive rubber or anisotropic conductive film (for example,
The electrode parts 29 and 31 are connected by a rubber band for the former and a heat seal connector for the latter. The scanning signal side lead-out electrode section 33 of the liquid crystal display cell 23 and the connection electrode section 34 of the scanning signal side circuit board 26 are similarly positioned and aligned by the respective alignment marks 35 and 36, and anisotropic conduction is conducted between them. Connect with rubber or anisotropic conductive film.

この時、本実施例の走査信号側回路基板26は第2図と
の対比で考えると、走査信号側回路基板6と2つのフレ
キシブルコネクタ12とを合せた如き形状として形成さ
れ、他方のデータ信号側回路基板25の一部に直接オー
バラップし得るように構成されている。より具体的には
、これらの回路基板25.26のオーバラップ部分には
各々駆動回路用電極部27.28が形成されており、両
者を直接接続できるように構成されている。この場合の
アライメントは液晶表示セル23の取出し電極29.3
3程の精度は必要とせず、液晶表示セル23の上・下基
Fi21.22の貼り合せ時の精度で充分行なえるよう
なピッチにて駆動回路用電極部27.28を形成すれば
よい。例えば、2゜0Mピッチにて形成される。
At this time, the scanning signal side circuit board 26 of this embodiment is formed in a shape similar to that of the scanning signal side circuit board 6 and two flexible connectors 12, when compared with FIG. It is configured so that it can directly overlap a part of the side circuit board 25. More specifically, drive circuit electrode portions 27 and 28 are formed in the overlapping portions of these circuit boards 25 and 26, respectively, so that they can be directly connected. In this case, the alignment is the extraction electrode 29.3 of the liquid crystal display cell 23.
The driving circuit electrode portions 27 and 28 need not be as precise as 3, but may be formed at pitches that can be achieved with sufficient accuracy when bonding the upper and lower bases Fi 21 and 22 of the liquid crystal display cell 23. For example, they are formed at a pitch of 2°0M.

また、各回路基板25.26には一般にガラスエポキシ
基板が用いられるが、従来の如くフレキシブルコネクタ
を介さず、本実施例によれば、両者間を直接半田付は接
続できるので充分なる強度が得られる。よって、液晶表
示セル23に無理な力が加わることがない。また、各回
路基板25゜26としてフレキシブル回路基板を用いた
場合においても、ガラスエポキシ基板の場合と同様にフ
レキシブルコネクタが不要なために接続が簡易化され、
部品点数も減少し、低コスト化を図れる。
Furthermore, glass epoxy boards are generally used for each circuit board 25, 26, but according to this embodiment, they can be directly connected by soldering without using a flexible connector as in the conventional case, so sufficient strength can be obtained. It will be done. Therefore, no excessive force is applied to the liquid crystal display cell 23. Furthermore, even when flexible circuit boards are used as the circuit boards 25 and 26, connections are simplified because flexible connectors are not required, as in the case of glass epoxy boards.
The number of parts is also reduced, making it possible to lower costs.

なお、本実施例を実施するに当り、回路パターンの設計
時に液晶表示セル23のアライメントにおける回路基板
25.26の相対位置を考慮し、これらの回路基板25
.26が重なり合うように設計する必要がある。また、
液晶駆動用LSI24は一般にフラットパッケージタイ
プのものが用いられるが、高容量になるに従い基板面積
が増大し重量も増加する。特に、本実施例のように透過
型LCDの場合には、表示領域外に駆動回路基板を配設
するため、より大型化してしまう。しかし、チップLS
Iをワイヤボンディング、TAB等の実装を行なうこと
により、−層小型・薄型化を図ることができる。
In implementing this embodiment, the relative positions of the circuit boards 25 and 26 in alignment of the liquid crystal display cell 23 are taken into consideration when designing the circuit pattern, and the circuit boards 25 and 26 are
.. 26 must be designed so that they overlap. Also,
The liquid crystal driving LSI 24 is generally of a flat package type, but as the capacity increases, the substrate area increases and the weight also increases. In particular, in the case of a transmissive LCD as in this embodiment, the drive circuit board is disposed outside the display area, resulting in an increase in size. However, the chip LS
By mounting I by wire bonding, TAB, etc., the -layer can be made smaller and thinner.

また、本実施例により形成された走査信号側回路基板2
6の駆動回路用信号の引き回し部分には充分なる空きス
ペースがあるため、液晶駆動用LSI24に入力する数
種の駆動電圧を発生させる分圧回路37(オペアンプを
含む)を実装させることも可能である。
Further, the scanning signal side circuit board 2 formed according to this embodiment
Since there is sufficient free space in the driver circuit signal route section 6, it is also possible to mount a voltage divider circuit 37 (including an operational amplifier) that generates several types of drive voltages to be input to the liquid crystal drive LSI 24. be.

また、フレキシブル回路基板を用いれば、コントローラ
部側へのコネクタ部分25aも一体化することができ、
−層間易化を向上させることができる。
Furthermore, if a flexible circuit board is used, the connector portion 25a to the controller section side can also be integrated.
- It is possible to improve interlayer facilitation.

効果 本発明は、上述したように、液晶表示セルに対し2種の
データ信号側回路基板及び走査信号側回路基板を位置決
め配置さ、せて接続した状態で、これらのデータ信号側
回路基板と走査信号側回路基板との電極部を直接的に接
続するようにしたので、フレキシブルコネクタ等を用い
ることなく、部品点数が少なく低コスト化の可能な状態
で、簡単、かつ、省力的な回路基板の接続を行なうこと
ができる。
Effects As described above, in the present invention, two types of data signal side circuit boards and scanning signal side circuit boards are positioned and connected to a liquid crystal display cell, and these data signal side circuit boards and scanning signal side circuit boards are connected to each other. Since the electrode part is directly connected to the signal side circuit board, there is no need to use flexible connectors, and the number of parts is small and costs can be reduced, making it easy and labor-saving. connection can be made.

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

第1図は本発明の一実施例を示す平面図、第2図は従来
例を示す平面図である。
FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a plan view showing a conventional example.

Claims (1)

【特許請求の範囲】[Claims] 液晶表示セルの取出し電極部と、前記液晶表示セル用の
データ信号側回路基板及び走査信号側回路基板の接続用
電極部とを位置決め配置させて接続した状態で、前記デ
ータ信号側回路基板と走査信号側回路基板との電極部を
直接的に接続したことを特徴とする液晶表示装置。
With the extraction electrode part of the liquid crystal display cell and the connection electrode parts of the data signal side circuit board and the scanning signal side circuit board for the liquid crystal display cell being positioned and connected, the data signal side circuit board and the scanning signal are connected. A liquid crystal display device characterized in that an electrode part is directly connected to a signal side circuit board.
JP7770588A 1988-03-30 1988-03-30 Liquid crystal display device Pending JPH01248133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7770588A JPH01248133A (en) 1988-03-30 1988-03-30 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7770588A JPH01248133A (en) 1988-03-30 1988-03-30 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPH01248133A true JPH01248133A (en) 1989-10-03

Family

ID=13641314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7770588A Pending JPH01248133A (en) 1988-03-30 1988-03-30 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPH01248133A (en)

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