JP3658127B2 - Display device - Google Patents

Display device Download PDF

Info

Publication number
JP3658127B2
JP3658127B2 JP2749197A JP2749197A JP3658127B2 JP 3658127 B2 JP3658127 B2 JP 3658127B2 JP 2749197 A JP2749197 A JP 2749197A JP 2749197 A JP2749197 A JP 2749197A JP 3658127 B2 JP3658127 B2 JP 3658127B2
Authority
JP
Japan
Prior art keywords
wiring board
input signal
electrode
display device
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.)
Expired - Fee Related
Application number
JP2749197A
Other languages
Japanese (ja)
Other versions
JPH10222086A (en
Inventor
雅則 高橋
俊通 大内
憲二 新堀
泰史 塩谷
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP2749197A priority Critical patent/JP3658127B2/en
Publication of JPH10222086A publication Critical patent/JPH10222086A/en
Application granted granted Critical
Publication of JP3658127B2 publication Critical patent/JP3658127B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/36Assembling printed circuits with other printed circuits
    • H05K3/361Assembling flexible printed circuits with other printed circuits

Description

【0001】
【発明の属する技術分野】
本発明は、表示装置における、表示素子とその周辺駆動回路との接続構造に関し、具体的には、表示素子と、該表示素子の画素電極に駆動波形を供給する駆動用半導体装置と、該駆動用半導体装置に電源及び制御信号を供給する入力信号用配線基板との接続構造、特に、上記駆動用半導体装置がテープオートメーティッドボンディング法(TAB法)によるテープキャリヤパッケージ(TCP)であり、上記入力信号用配線基板がガラスエポキシPCB(Printed Circuit Board)基板である回路基板間の接続構造に関するものである。
【0002】
【従来の技術】
従来、エレクトロルミネッセンス(EL)表示パネル、単純マトリクス型やアクティブマトリクス型の液晶表示装置等のマトリクス状に画素電極が形成されたフラットディスプレイの駆動回路接続構造は、表示素子のガラス基板やプラスチック基板の接続電極とTCPの出力電極とをACF(異方性導電接着膜)を介して熱圧着接続し、TCPの入力電極とPCB基板の接続電極とを半田接続していた。
【0003】
図6に一般的な単純マトリクス型の液晶表示装置の平面模式図を示す。図7はその部分概略断面図である。図中、1a,1bは液晶素子のガラス基板、2a,2bは偏光板、5はシール材、6はTCPとの接続電極、23は液晶である。また、3はTCPの駆動用半導体チップ、15a,15bはそれぞれ出力側,入力側の接続用突起電極、4a,4e,4fはベースフィルムであり、7は出力電極、8は入力電極、14は駆動用半導体チップ3を固定するためのポッティング樹脂である。さらに、13はPCB基板であり、12はその接続電極である。また、18は制御回路(図示せず)からの入力信号を供給するフレキシブル配線基板、22はガラス基板1a,1bそれぞれの側のPCB基板13同士を接続するフレキシブル配線基板である。20はガラス基板1a側の電極を駆動するためのTCPである。
【0004】
【発明が解決しようとする課題】
上記液晶素子のガラス基板1bとTCPの出力電極7との接続部は、ベースフィルム上にパターニング形成されたTCPの出力電極7がACF9により液晶素子のガラス基板1b上の接続電極6に接着固定されており、またPCB基板13とTCPの入力電極8との接続部は、TCPのベースフィルムが開口され、パターニング形成された電極8がむき出しの状態でPCBの接続電極12の半田ランドに半田付け固定されていた。
【0005】
このため、環境温度が低温(例えば−20℃)乃至高温(例えば60℃)に変動した場合、液晶素子のガラス基板1bとPCB基板13との熱膨張差により、TCPとPCB基板13が配置されるガラス基板1bの端辺方向にTCP内に剪断応力が生じ、TCPの出力電極7及び入力電極8がそれぞれ上記の如く接続固定されているために、ベースフィルムがなく電極がむき出しで機械的強度の弱い入力電極8部が破断し、不良に至ることがあった。また、TCPに搭載された駆動用半導体チップ3とTCPの接続電極(インナーリード)との接続部の損傷や、TCPの出力電極7とガラス基板1bとの接着接続部の剥離等により不良に至る場合があった。
【0006】
これらの不良現象は、特にパネルサイズが10インチを超える液晶表示装置の場合に、液晶素子のガラス基板とPCB基板との熱膨張差による寸法変化の差が大きく顕著であった。
【0007】
本発明の目的は、上記のような表示装置の駆動回路において、環境温度の変動による不良の発生を防止し、信頼性の高い表示装置を提供することにある。
【0008】
【課題を解決するための手段】
本発明は、マトリクス状に形成された画素電極を備えた透明基板を有する表示素子と、第一のフレキシブル配線基板に駆動用半導体チップを搭載してなる上記画素電極に駆動波形を供給する駆動用半導体装置と、該駆動用半導体装置に電源及び制御信号を供給する入力信号用配線基板と、を接続した表示装置において、
上記透明基板上で、上記第一のフレキシブル配線基板に搭載した上記駆動用半導体チップの出力電極上記画素電極から引き出された接続電極とが接着固定され、
上記駆動用半導体チップの入力電極上記入力信号用配線基板の接続電極とが接着固定され、
且つ、上記駆動用半導体チップの入力電極と上記入力信号用配線基板の接続電極とが接着固定されている接続部位と、上記駆動用半導体チップとの間の領域において、上記第一のフレキシブル基板と上記透明基板とが接着固定されていることを特徴とする表示装置である。
【0009】
本発明においては、フレキシブル配線基板が、入力信号用配線基板との接続部位と半導体チップとの間において、表示素子の透明基板に接着固定されることにより、表示素子の透明基板と入力信号用配線基板の熱膨張差により発生した剪断応力を、上記接着固定部と信号用配線基板との接続部位との間のフレキシブル配線基板のフレキシブル性により吸収することで、透明基板との接続部及び半導体チップとの接続電極部に該剪断応力を伝えないことにより、駆動用半導体装置の破損を防ぐことができる。
【0010】
また、本発明においては、フレキシブル配線基板に駆動用半導体チップを搭載してなる駆動用半導体装置のベースフィルムにスリットを設けて樹脂により連結することにより、表示素子の透明基板と入力信号用配線基板の熱膨張差により発生した剪断応力を該スリットで吸収緩和し、該駆動用半導体装置の入力電極部の破断、駆動用半導体チップとフレキシブル配線基板の接続電極との接続部の損傷、該フレキシブル配線基板の出力電極と透明基板上の画素電極との接続部の剥離等損傷を防止することができる。
【0011】
本発明においては、上記入力信号用配線基板を、透明基板の端辺方向に複数に分割し、各入力信号用配線基板を略U字形の第二のフレキシブル配線基板により接続することにより、或いは、各入力信号用配線基板に入力信号を分配供給する分配用配線基板を設け、各入力信号用配線基板と上記分配用配線基板とを第三のフレキシブル配線基板により接続することにより、さらに、上記応力緩和効果がより良く得られる。
【0012】
【発明の実施の形態】
以下、本発明の好ましい実施形態である、表示素子として液晶素子、駆動用半導体装置としてTCP、入力信号用配線基板としてPCB基板を有する液晶表示装置を例に挙げて本発明を詳細に説明する。
【0013】
[実施形態1]
図1は、本発明の一実施形態の液晶表示装置の駆動回路接続構造を示す概略断面図である。図中、1a,1bは液晶素子のガラス基板、2a,2bは偏光板、5はシール材、6はTCPとの接続電極、23は液晶である。また、3はTCPの駆動用半導体チップ、15a,15bはそれぞれ出力側,入力側の接続用突起電極、4a〜4dはベースフィルムであり、7は出力電極、8は入力電極、14は駆動用半導体チップ3を固定するためのポッティング樹脂、16a,16bは連結樹脂である。さらに、13はPCB基板であり、12はその接続電極である。
【0014】
本発明において、ベースフィルム4a〜4dとしては、フレキシブル性を有するフィルムが用いられ、例えば、ユーピレックスS(商品名、宇部興産社製)、アピカルTA(商品名、鐘淵化学社製)、カプトンV(商品名、東レ社製)などのポリイミドフィルムが好適に用いられる。
【0015】
図1において、液晶素子の画素電極から引き出された接続電極6は、該画素電極に駆動波形を供給するTCPの出力電極7とACF9を介して接続されており、TCPの入力電極8はTCPに電源及び制御信号を供給するPCB基板13の接続電極12とACF11を介して接続されている。
【0016】
尚、10はTCPとガラス基板1bとを接着固定する接着剤であり、ACF9の導電性微粒子を除いた接着剤のみを用いることができる。また、シリコーン接着剤や、熱可塑性接着剤、熱硬化型接着剤、UV硬化型接着剤も用いることができる。
【0017】
本発明においては、TCPとガラス基板1bとが、TCPとPCB基板との接続部位(11)と駆動用半導体チップ3の間において接着固定されている。従って、ガラス基板1bの端辺方向にTCPに剪断応力が生じても、ベースフィルム4cのフレキシブル性により該応力が吸収されるため、電極や他の部材との接続部に影響を与えない。
【0018】
さらに、本実施形態においては、TCPのベースフィルムが、ガラス基板1bの端辺に略平行にスリット状に切断され(4bと4c間及び4cと4d間)、該スリットを連結樹脂16a、16bにより連結している。よって、上記剪断応力がさらに当該スリットで吸収緩和される。
【0019】
特に、本発明においては、当該スリットを、一般的に配線数の少ないTCPの入力電極8側に設けることにより、微細な接続と信頼性の要求される出力電極7とガラス基板1bの接続電極6との接続部や、駆動用半導体チップ3と入力電極8,出力電極7との接続部に上記応力が伝達せず、その損傷を確実に防止することができる。
【0020】
本発明において、ベースフィルムのスリットを連結している連結樹脂16a,16bとしては、TCP内に生じた応力を緩和する作用を有する軟質樹脂を用い、例えば、低温硬化型の軟性ポリイミド(例えば商品名ユピコート)が好ましく用いられる。
【0021】
[実施形態2]
図2に本発明の第二の実施形態の概略断面図を示す。尚、先に示した実施形態と同じ部材には同じ符号を付して説明を省略する。
【0022】
本実施形態においては、連結樹脂16a,16b部分を利用してTCPを折り曲げて、液晶素子の背面に設けられたバックライトモジュール24の裏面にPCB基板13を配置させたものである。当該構成により、ディスプレイモニターとしての額縁を縮小化することができ、また、通常裏面に別途配置されている制御コントローラからPCB基板13に信号を伝達する経路を短くでき、信号ノイズを低減することができる。
【0023】
[実施形態3]
図3に本発明の第三の実施形態の平面模式図を示す。本実施形態は、入力信号用配線基板であるPCB基板13を複数に分割したものである。本発明にかかるPCB基板には、18に示すフレキシブル基板を介して制御回路(図示しない)より入力信号が供給されるが、本実施形態においては、分割されたPCB基板間がU字形のフレキシブル配線基板17によって接続されており、当該構成により、必要な信号が各PCB基板に供給される。尚、20はガラス基板1a側の電極に接続されたTCPである。
【0024】
本実施形態においては、PCB基板を分割したことにより、ガラス基板1bとPCB基板13との熱膨張差によるTCPへの剪断応力を小さくすることができ、さらに、U字形のフレキシブル配線基板17により分割したPCB基板間を接続しているため、双方のPCB基板の熱膨張による延び変形が該フレキシブル配線基板17によって吸収されるため、熱膨張による変形応力を分割数分だけ小さくすることができる。
【0025】
[実施形態4]
本発明の第四の実施形態の平面模式図を図4に示す。本実施形態は、実施形態3と同様にPCB基板13が分割されており、各PCB基板には入力信号分配用配線基板25からフレキシブル配線基板21を介して入力信号が分配供給される。従って、実施形態3と同様に、PCB基板13の分割による剪断応力の緩和効果が得られ、また、各PCB基板はフレキシブル配線基板21により入力信号分配用配線基板25に接続されているため、PCB基板の熱膨張による延び変形が該フレキシブル配線基板17によって吸収され、変形応力を低減することができる。
【0026】
さらに、本実施形態においては、実施形態2と同様に、TCPに設けたスリットを連結する連結樹脂16a,16b部分で折り曲げてガラス基板1b側の電極駆動用のPCB基板13と入力信号分配用配線基板25を液晶素子の裏面側へ配置させる。従って実施形態2と同様に、縮小化と信号ノイズの低減を図ることができる。
【0027】
[実施形態5]
図5は本発明の第五の実施形態の平面模式図であり、実施形態4とほぼ同じ構成であるが、本実施形態においては、フレキシブル基板21を折り曲げることにより入力信号分配用配線基板25を液晶素子の裏面側へ配置させる構造となっている。
【0028】
【発明の効果】
以上説明したように、本発明においては、表示装置を構成する各基板の熱膨張差により発生する剪断応力を緩和吸収し、部材の破損や接続不良を防止する。よって、環境温度変動に耐え、信頼性の高き表示装置が提供される。特に、本発明においては、通常PCB基板で構成される入力信号用配線基板を分割し、フレキシブル配線基板を利用してこれらを接続することにより、さらに上記剪断応力を吸収緩和することができ、より信頼性の高い表示装置が実現する。
【図面の簡単な説明】
【図1】本発明の第一の実施形態の概略断面図である。
【図2】本発明の第二の実施形態の概略断面図である。
【図3】本発明の第三の実施形態の平面模式図である。
【図4】本発明の第四の実施形態の平面模式図である。
【図5】本発明の第五の実施形態の平面模式図である。
【図6】従来の液晶表示装置の駆動回路接続構造を示す平面模式図である。
【図7】従来の液晶表示装置の駆動回路接続構造を示す概略断面図である。
【符号の説明】
1a,1b ガラス基板
2a,2b 偏光板
3 駆動用半導体チップ
4a〜4d ベースフィルム
5 シール材
6 接続電極
7 出力電極
8 入力電極
9 ACF
10 接着剤
11 ACF
12 接続電極
13 PCB基板
14 ポッティング樹脂
15a,15b 接続用突起電極
16a,16b 連結樹脂
17,18 フレキシブル配線基板
20 TCP
21,22 フレキシブル配線基板
23 液晶
24 バックライトモジュール
25 入力信号分配用配線基板
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection structure between a display element and its peripheral drive circuit in a display device. Specifically, the display element, a drive semiconductor device that supplies a drive waveform to a pixel electrode of the display element, and the drive Connection structure with input signal wiring board for supplying power and control signal to semiconductor device for semiconductor, in particular, the driving semiconductor device is a tape carrier package (TCP) by tape automated bonding method (TAB method), and the input The present invention relates to a connection structure between circuit boards in which a signal wiring board is a glass epoxy PCB (Printed Circuit Board) board.
[0002]
[Prior art]
Conventionally, a driving circuit connection structure of a flat display in which pixel electrodes are formed in a matrix shape such as an electroluminescence (EL) display panel, a simple matrix type or an active matrix type liquid crystal display device, etc., is a glass substrate or a plastic substrate of a display element. The connection electrode and the TCP output electrode were connected by thermocompression bonding via an ACF (anisotropic conductive adhesive film), and the TCP input electrode and the connection electrode of the PCB substrate were soldered.
[0003]
FIG. 6 is a schematic plan view of a general simple matrix type liquid crystal display device. FIG. 7 is a partial schematic cross-sectional view thereof. In the figure, 1a and 1b are glass substrates of the liquid crystal element, 2a and 2b are polarizing plates, 5 is a sealing material, 6 is a connection electrode with TCP, and 23 is a liquid crystal. Also, 3 is a TCP driving semiconductor chip, 15a and 15b are output projection electrodes on the output side and input side, 4a, 4e and 4f are base films, 7 is an output electrode, 8 is an input electrode, and 14 is This is a potting resin for fixing the driving semiconductor chip 3. Further, 13 is a PCB substrate, and 12 is a connection electrode thereof. Reference numeral 18 denotes a flexible wiring board that supplies an input signal from a control circuit (not shown), and reference numeral 22 denotes a flexible wiring board that connects the PCB boards 13 on the glass substrates 1a and 1b. Reference numeral 20 denotes a TCP for driving the electrode on the glass substrate 1a side.
[0004]
[Problems to be solved by the invention]
The connection part between the glass substrate 1b of the liquid crystal element and the TCP output electrode 7 is bonded and fixed to the connection electrode 6 on the glass substrate 1b of the liquid crystal element by the TCP output electrode 7 formed by patterning on the base film. In addition, the connection portion between the PCB substrate 13 and the TCP input electrode 8 is fixed by soldering to the solder land of the PCB connection electrode 12 with the TCP base film opened and the patterned electrode 8 exposed. It had been.
[0005]
For this reason, when the environmental temperature fluctuates from a low temperature (for example, −20 ° C.) to a high temperature (for example, 60 ° C.), the TCP and the PCB substrate 13 are arranged due to the difference in thermal expansion between the glass substrate 1b of the liquid crystal element and the PCB substrate 13. Since the shear stress is generated in the TCP in the direction of the edge of the glass substrate 1b and the TCP output electrode 7 and the input electrode 8 are connected and fixed as described above, there is no base film and the electrode is exposed and has a mechanical strength. 8 parts of the weak input electrode may break, leading to failure. In addition, a failure is caused by damage to the connection portion between the driving semiconductor chip 3 mounted on the TCP and the connection electrode (inner lead) of the TCP, peeling of the adhesive connection portion between the TCP output electrode 7 and the glass substrate 1b, or the like. There was a case.
[0006]
These defective phenomena are particularly remarkable in the case of a liquid crystal display device having a panel size exceeding 10 inches, in which the difference in dimensional change due to the difference in thermal expansion between the glass substrate and the PCB substrate of the liquid crystal element is significant.
[0007]
An object of the present invention is to provide a display device with high reliability by preventing the occurrence of defects due to fluctuations in environmental temperature in the drive circuit of the display device as described above.
[0008]
[Means for Solving the Problems]
The present invention provides a display element having a transparent substrate having pixel electrodes formed in a matrix, and a driving waveform for supplying a driving waveform to the pixel electrode in which a driving semiconductor chip is mounted on a first flexible wiring substrate. Oite a semiconductor device, a display equipment which a wiring board for the input signal for supplying power and control signals to the driving semiconductor device, the connected,
The transparent substrate, and the first semiconductor chip for the drive which is mounted on the flexible wiring board output electrode and the connection electrode drawn from the pixel electrode is bonded and fixed,
The input electrode of the driving semiconductor chip and the connection electrode of the input signal wiring board are bonded and fixed,
In addition, in the region between the connection portion where the input electrode of the driving semiconductor chip and the connection electrode of the input signal wiring board are bonded and fixed, and the driving semiconductor chip, the first flexible substrate and The display device is characterized by being bonded and fixed to the transparent substrate .
[0009]
In the present invention, the flexible wiring board is bonded and fixed to the transparent substrate of the display element between the connection portion of the input signal wiring board and the semiconductor chip, thereby allowing the transparent substrate of the display element and the input signal wiring. The shearing stress generated by the difference in thermal expansion of the substrate is absorbed by the flexibility of the flexible wiring board between the bonding fixing part and the connection part of the signal wiring board, so that the connecting part to the transparent substrate and the semiconductor chip By not transmitting the shear stress to the connection electrode portion, it is possible to prevent the driving semiconductor device from being damaged.
[0010]
In the present invention, the transparent substrate of the display element and the input signal wiring substrate are formed by providing a slit in the base film of the driving semiconductor device in which the driving semiconductor chip is mounted on the flexible wiring substrate and connecting with a resin. The shear stress generated due to the difference in thermal expansion is absorbed and relaxed by the slit, the input electrode portion of the driving semiconductor device is broken, the connection portion of the driving semiconductor chip and the connection electrode of the flexible wiring board is damaged, the flexible wiring It is possible to prevent damage such as peeling of the connection portion between the output electrode of the substrate and the pixel electrode on the transparent substrate.
[0011]
In the present invention, the input signal wiring board is divided into a plurality in the direction of the edge of the transparent substrate, and each input signal wiring board is connected by a substantially U-shaped second flexible wiring board, or By providing a distribution wiring board that distributes and supplies input signals to each input signal wiring board, and connecting each input signal wiring board and the distribution wiring board with a third flexible wiring board, the stress is further increased. The relaxation effect is better obtained.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail by taking as an example a liquid crystal display device having a liquid crystal element as a display element, TCP as a driving semiconductor device, and a PCB substrate as an input signal wiring substrate, which is a preferred embodiment of the present invention.
[0013]
[Embodiment 1]
FIG. 1 is a schematic cross-sectional view showing a drive circuit connection structure of a liquid crystal display device according to an embodiment of the present invention. In the figure, 1a and 1b are glass substrates of the liquid crystal element, 2a and 2b are polarizing plates, 5 is a sealing material, 6 is a connection electrode with TCP, and 23 is a liquid crystal. Also, 3 is a TCP driving semiconductor chip, 15a and 15b are output protruding electrodes on the output side and input side, 4a to 4d are base films, 7 is an output electrode, 8 is an input electrode, and 14 is for driving. Potting resins 16a and 16b for fixing the semiconductor chip 3 are connecting resins. Further, 13 is a PCB substrate, and 12 is a connection electrode thereof.
[0014]
In the present invention, films having flexibility are used as the base films 4a to 4d. For example, Upilex S (trade name, manufactured by Ube Industries), Apical TA (trade name, manufactured by Kaneka Chemical Co., Ltd.), Kapton V A polyimide film such as (trade name, manufactured by Toray Industries, Inc.) is preferably used.
[0015]
In FIG. 1, a connection electrode 6 drawn out from a pixel electrode of a liquid crystal element is connected to a TCP output electrode 7 for supplying a drive waveform to the pixel electrode via an ACF 9, and a TCP input electrode 8 is connected to the TCP. It is connected to the connection electrode 12 of the PCB substrate 13 for supplying power and control signals via the ACF 11.
[0016]
Reference numeral 10 denotes an adhesive for adhering and fixing the TCP and the glass substrate 1b, and only an adhesive excluding the conductive fine particles of ACF9 can be used. Silicone adhesives, thermoplastic adhesives, thermosetting adhesives, and UV curable adhesives can also be used.
[0017]
In the present invention, the TCP and the glass substrate 1 b are bonded and fixed between the connection portion (11) between the TCP and the PCB substrate and the driving semiconductor chip 3. Therefore, even if shear stress is generated in the TCP in the direction of the edge of the glass substrate 1b, the stress is absorbed by the flexibility of the base film 4c, so that the connection portion with the electrode and other members is not affected.
[0018]
Further, in the present embodiment, the TCP base film is cut into a slit shape substantially parallel to the edge of the glass substrate 1b (between 4b and 4c and between 4c and 4d), and the slit is formed by the connecting resins 16a and 16b. It is connected. Accordingly, the shear stress is further absorbed and relaxed by the slit.
[0019]
In particular, in the present invention, the slit is provided on the TCP input electrode 8 side, which generally has a small number of wires, so that the output electrode 7 and the connection electrode 6 of the glass substrate 1b that require fine connection and reliability are required. The stress is not transmitted to the connection portion between the drive semiconductor chip 3 and the connection portion between the input electrode 8 and the output electrode 7, and damage can be reliably prevented.
[0020]
In the present invention, as the connecting resins 16a and 16b that connect the slits of the base film, a soft resin having a function of relieving stress generated in the TCP is used. For example, a low-temperature curing type flexible polyimide (for example, a trade name) Iupicoat) is preferably used.
[0021]
[Embodiment 2]
FIG. 2 shows a schematic sectional view of the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the same member as embodiment shown previously, and description is abbreviate | omitted.
[0022]
In the present embodiment, the PCB is bent on the back surface of the backlight module 24 provided on the back surface of the liquid crystal element by bending the TCP using the connecting resin portions 16a and 16b. With this configuration, it is possible to reduce the frame as a display monitor, and it is possible to shorten the path for transmitting a signal to the PCB board 13 from a control controller that is usually separately arranged on the back surface, thereby reducing signal noise. it can.
[0023]
[Embodiment 3]
FIG. 3 shows a schematic plan view of the third embodiment of the present invention. In the present embodiment, a PCB substrate 13 that is an input signal wiring substrate is divided into a plurality of portions. An input signal is supplied to a PCB board according to the present invention from a control circuit (not shown) via a flexible board shown in 18. In this embodiment, a U-shaped flexible wiring is provided between the divided PCB boards. The circuit board is connected by the board 17, and a necessary signal is supplied to each PCB board by this configuration. Reference numeral 20 denotes a TCP connected to the electrode on the glass substrate 1a side.
[0024]
In this embodiment, by dividing the PCB substrate, the shear stress to the TCP due to the difference in thermal expansion between the glass substrate 1b and the PCB substrate 13 can be reduced, and further, the division is made by the U-shaped flexible wiring substrate 17. Since the PCB substrates are connected to each other, extension deformation due to thermal expansion of both PCB substrates is absorbed by the flexible wiring substrate 17, so that deformation stress due to thermal expansion can be reduced by the number of divisions.
[0025]
[Embodiment 4]
A schematic plan view of the fourth embodiment of the present invention is shown in FIG. In this embodiment, the PCB board 13 is divided as in the third embodiment, and input signals are distributed and supplied from the input signal distribution wiring board 25 through the flexible wiring board 21 to each PCB board. Therefore, as in the third embodiment, the effect of reducing the shear stress by dividing the PCB substrate 13 can be obtained, and each PCB substrate is connected to the input signal distribution wiring substrate 25 by the flexible wiring substrate 21. Extension deformation due to thermal expansion of the substrate is absorbed by the flexible wiring substrate 17, and deformation stress can be reduced.
[0026]
Further, in the present embodiment, as in the second embodiment, the PCB substrate 13 for driving the electrode on the glass substrate 1b side and the input signal distribution wiring are bent by the connecting resins 16a and 16b that connect the slits provided in the TCP. The substrate 25 is disposed on the back side of the liquid crystal element. Therefore, similarly to the second embodiment, it is possible to reduce the size and reduce the signal noise.
[0027]
[Embodiment 5]
FIG. 5 is a schematic plan view of the fifth embodiment of the present invention. The configuration is almost the same as that of the fourth embodiment. In this embodiment, the input signal distribution wiring board 25 is formed by bending the flexible board 21. The structure is arranged on the back side of the liquid crystal element.
[0028]
【The invention's effect】
As described above, in the present invention, the shear stress generated by the difference in thermal expansion of each substrate constituting the display device is relaxed and absorbed, and damage to members and poor connection are prevented. Therefore, a highly reliable display device that can withstand environmental temperature fluctuations is provided. In particular, in the present invention, it is possible to further absorb and relax the above-mentioned shear stress by dividing the input signal wiring board usually composed of a PCB board and connecting them using a flexible wiring board. A highly reliable display device is realized.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention.
FIG. 2 is a schematic sectional view of a second embodiment of the present invention.
FIG. 3 is a schematic plan view of a third embodiment of the present invention.
FIG. 4 is a schematic plan view of a fourth embodiment of the present invention.
FIG. 5 is a schematic plan view of a fifth embodiment of the present invention.
FIG. 6 is a schematic plan view showing a driving circuit connection structure of a conventional liquid crystal display device.
FIG. 7 is a schematic cross-sectional view showing a driving circuit connection structure of a conventional liquid crystal display device.
[Explanation of symbols]
1a, 1b Glass substrates 2a, 2b Polarizing plate 3 Driving semiconductor chips 4a-4d Base film 5 Sealing material 6 Connection electrode 7 Output electrode 8 Input electrode 9 ACF
10 Adhesive 11 ACF
12 connecting electrode 13 PCB substrate 14 potting resin 15a, 15b protruding electrode 16a, 16b connecting resin 17, 18 flexible wiring substrate 20 TCP
21, 22 Flexible wiring board 23 Liquid crystal 24 Backlight module 25 Input signal distribution wiring board

Claims (12)

マトリクス状に形成された画素電極を備えた透明基板を有する表示素子と、第一のフレキシブル配線基板に駆動用半導体チップを搭載してなる上記画素電極に駆動波形を供給する駆動用半導体装置と、該駆動用半導体装置に電源及び制御信号を供給する入力信号用配線基板と、を接続した表示装置において、
上記透明基板上で、上記第一のフレキシブル配線基板に搭載した上記駆動用半導体チップの出力電極上記画素電極から引き出された接続電極とが接着固定され、
上記駆動用半導体チップの入力電極上記入力信号用配線基板の接続電極とが接着固定され、
且つ、上記駆動用半導体チップの入力電極と上記入力信号用配線基板の接続電極とが接着固定されている接続部位と、上記駆動用半導体チップとの間の領域において、上記第一のフレキシブル基板と上記透明基板とが接着固定されていることを特徴とする表示装置
A display element having a transparent substrate having pixel electrodes formed in a matrix, and a driving semiconductor device for supplying a driving waveform to the pixel electrode in which a driving semiconductor chip is mounted on a first flexible wiring board; Oite display equipment connected to a wiring board for the input signal for supplying power and control signals to the driving semiconductor device,
The transparent substrate, and the first semiconductor chip for the drive which is mounted on the flexible wiring board output electrode and the connection electrode drawn from the pixel electrode is bonded and fixed,
The input electrode of the driving semiconductor chip and the connection electrode of the input signal wiring board are bonded and fixed,
In addition, in the region between the connection portion where the input electrode of the driving semiconductor chip and the connection electrode of the input signal wiring board are bonded and fixed, and the driving semiconductor chip, the first flexible substrate and A display device, wherein the transparent substrate is bonded and fixed .
上記第一のフレキシブル配線基板を構成するベースフィルムが、上記透明基板の端辺に略平行に少なくとも1カ所スリット状に切断され、該スリットが軟質樹脂により連結されている請求項1記載の表示装置The display device according to claim 1, wherein a base film constituting the first flexible wiring board is cut into a slit shape at least at one place substantially parallel to an edge of the transparent substrate, and the slit is connected with a soft resin. . 上記スリットが、入力信号用配線基板の接続電極と第一のフレキシブル配線基板の入力電極との接続部と、駆動用半導体チップとの間に形成されている請求項2記載の表示装置3. The display device according to claim 2, wherein the slit is formed between a connection portion between the connection electrode of the input signal wiring board and the input electrode of the first flexible wiring board and the driving semiconductor chip. 上記入力信号用配線基板が、透明基板の端辺方向に複数に分割され、各入力信号用配線基板が略U字形の第二のフレキシブル配線基板により接続されている請求項1〜3いずれかに記載の表示装置The input signal wiring board is divided into a plurality in the direction of the edge of the transparent substrate, and each input signal wiring board is connected by a substantially U-shaped second flexible wiring board. The display device described. 上記第一のフレキシブル配線基板のスリットにおいて該配線基板を折り曲げ、液晶素子の背面に設置されたバックライトモジュールの裏面に入力信号用配線基板を配置させる請求項2〜4いずれかに記載の表示装置The display device according to claim 2, wherein the wiring substrate is bent at the slit of the first flexible wiring substrate, and the input signal wiring substrate is disposed on the back surface of the backlight module disposed on the back surface of the liquid crystal element. . 上記入力信号用配線基板が、透明基板の端辺方向に複数に分割され、さらに、各入力信号用配線基板に入力信号を分配供給する分配用配線基板を有し、各入力信号用配線基板と上記分配用配線基板とが第三のフレキシブル配線基板により接続されている請求項1記載の表示装置The input signal wiring board is divided into a plurality in the direction of the edge of the transparent substrate, and further includes a distribution wiring board that distributes and supplies input signals to each input signal wiring board. The display device according to claim 1, wherein the distribution wiring board is connected by a third flexible wiring board. 上記第一のフレキシブル配線基板を構成するベースフィルムが、上記透明基板の端辺に略平行に少なくとも1カ所スリット状に切断され、該スリットが軟質樹脂により連結されている請求項6記載の表示装置The display device according to claim 6, wherein a base film constituting the first flexible wiring board is cut into a slit shape at least at one location substantially parallel to an edge of the transparent substrate, and the slit is connected with a soft resin. . 上記第一のフレキシブル配線基板のスリットにおいて該配線基板を折り曲げ、液晶素子の背面に設置されたバックライトモジュールの裏面に入力信号用配線基板と分配用配線基板とを配置させる請求項7記載の表示装置8. The display according to claim 7, wherein the wiring board is bent at the slit of the first flexible wiring board, and the input signal wiring board and the distribution wiring board are arranged on the back surface of the backlight module installed on the back surface of the liquid crystal element. Equipment . 上記第三のフレキシブル配線基板を折り曲げて、液晶素子の背面に設置されたバックライトモジュールの裏面に分配用配線基板を配置させる請求項6又は7記載の表示装置8. The display device according to claim 6, wherein the third flexible wiring board is bent to dispose the distribution wiring board on the back surface of the backlight module installed on the back surface of the liquid crystal element. 上記駆動用半導体装置が、テープオートメーティッドボンディング法によるテープキャリヤパッケージである請求項1〜9いずれかに記載の表示装置The display device according to claim 1, wherein the semiconductor device for driving is a tape carrier package by a tape automated bonding method. 上記入力信号用配線基板がPCB基板である請求項1〜10いずれかに記載の表示装置The display device according to claim 1, wherein the input signal wiring substrate is a PCB substrate. 上記表示素子が一対の電極基板間に液晶を保持してなる液晶素子である請求項1〜11いずれかに記載の表示装置 Display device according to any of claims 1 to 11 is a liquid crystal device to which the display element is formed by holding a liquid crystal between a pair of electrode substrates.
JP2749197A 1997-02-12 1997-02-12 Display device Expired - Fee Related JP3658127B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2749197A JP3658127B2 (en) 1997-02-12 1997-02-12 Display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2749197A JP3658127B2 (en) 1997-02-12 1997-02-12 Display device

Publications (2)

Publication Number Publication Date
JPH10222086A JPH10222086A (en) 1998-08-21
JP3658127B2 true JP3658127B2 (en) 2005-06-08

Family

ID=12222615

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2749197A Expired - Fee Related JP3658127B2 (en) 1997-02-12 1997-02-12 Display device

Country Status (1)

Country Link
JP (1) JP3658127B2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3688915B2 (en) 1998-11-27 2005-08-31 株式会社 日立ディスプレイズ Liquid crystal display device
KR100570080B1 (en) * 1998-12-02 2006-08-31 삼성전자주식회사 Liquid crystal display module
JP3808224B2 (en) 1998-12-02 2006-08-09 株式会社 日立ディスプレイズ Liquid crystal display
KR100439427B1 (en) * 2000-11-15 2004-07-09 가부시끼가이샤 도시바 Displaying device
KR101001986B1 (en) * 2003-10-30 2010-12-16 엘지디스플레이 주식회사 Liquid crystal display device and method of fabricating the same
JP2006126294A (en) * 2004-10-26 2006-05-18 Toshiba Matsushita Display Technology Co Ltd Planar display device
JP4727216B2 (en) 2004-11-30 2011-07-20 株式会社 日立ディスプレイズ Organic EL display device
WO2010032520A1 (en) * 2008-09-17 2010-03-25 シャープ株式会社 Display device and television reception device

Also Published As

Publication number Publication date
JPH10222086A (en) 1998-08-21

Similar Documents

Publication Publication Date Title
US6952250B2 (en) Pressure-welded structure of flexible circuit boards
US6133978A (en) Tape carrier package and liquid crystal display device
JP3598994B2 (en) Manufacturing method of electro-optical device
KR100321883B1 (en) Structure and method of mounting semiconductor device and liquid crystal display device
JP3658127B2 (en) Display device
US5563619A (en) Liquid crystal display with integrated electronics
JPH11126039A (en) Display device
EP0776038B1 (en) Integrated circuit driver for a liquid crystal device
JP3360445B2 (en) Flexible wiring board connection structure
JP2003262884A (en) Liquid crystal display device
JP3509573B2 (en) Flexible substrate tape material, flexible substrate manufacturing method, semiconductor device manufacturing method, and liquid crystal device manufacturing method
KR100320309B1 (en) Liquid-crystal-panel driver ic package and liquid crystal panel module
KR100256911B1 (en) Tape carrier package and liquid crystal display device including such tape carrier package
JPH11135909A (en) Electronic equipment and flexible wiring board
JP2001264794A (en) Method for manufacturing liquid crystal display device
JP3013433B2 (en) Wiring connection structure and electro-optical device
JPH0827595B2 (en) Display device
JP2001125127A (en) Liquid crystal device and connecting method therefor
JP2002258767A (en) Plane display device, its manufacturing method, and printed circuit board for use in it
KR20080018027A (en) Tab package and method of reworking tab package
JPH11145373A (en) Tape carrier package, and liquid crystal display using the tape carrier package
JP2000002883A (en) Liquid crystal display element
JPH04220623A (en) Liquid crystal display unit
JPH02245789A (en) Liquid crystal display device
JPH04321245A (en) Lcd module

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20041001

A131 Notification of reasons for refusal

Effective date: 20041026

Free format text: JAPANESE INTERMEDIATE CODE: A131

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20041210

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Effective date: 20050222

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050311

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 3

Free format text: PAYMENT UNTIL: 20080318

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090318

Year of fee payment: 4

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100318

Year of fee payment: 5

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100318

Year of fee payment: 5

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110318

Year of fee payment: 6

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 7

Free format text: PAYMENT UNTIL: 20120318

LAPS Cancellation because of no payment of annual fees