JP2920843B2 - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JP2920843B2 JP2920843B2 JP3047869A JP4786991A JP2920843B2 JP 2920843 B2 JP2920843 B2 JP 2920843B2 JP 3047869 A JP3047869 A JP 3047869A JP 4786991 A JP4786991 A JP 4786991A JP 2920843 B2 JP2920843 B2 JP 2920843B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- display device
- circuit board
- wiring
- 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 - Lifetime
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
- H05K1/0296—Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295
- H05K1/0298—Multilayer 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)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液晶表示装置の駆動回
路部を小型化し、液晶表示装置全体の小型化、表示画面
の大型化に適するようにした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 in which the drive circuit section of the liquid crystal display device is reduced in size, which is suitable for downsizing the entire liquid crystal display device and increasing the size of the display screen.
【０００２】[0002]
【従来の技術】液晶表示素子に直接接続されて走査電極
や信号電極を駆動し、液晶表示素子の画面に表示を行な
わせるためのＬＳＩなどを含む回路部品は、通常、液晶
表示素子と共に其の周囲や裏面に配置され、これらが同
一ケース内に収納されて一つの液晶表示装置を構成する
ようになっている。2. Description of the Related Art A circuit component including an LSI for directly connecting a liquid crystal display element to drive scanning electrodes and signal electrodes to display an image on a screen of the liquid crystal display element is usually provided together with the liquid crystal display element. They are arranged around and on the back side, and are housed in the same case to constitute one liquid crystal display device.
【０００３】近年、液晶表示素子の表示面が大きくな
り、複雑な表示を行なわせるようになるのに伴って、上
記回路部品の数量も多くなり、液晶表示装置の表示画面
以外の額縁に相当する部分に広い面積が必要となり、液
晶表示装置の小型化が困難になって来た。一方、半導体
素子を用いて効率よく量産的に電子機器を製造するため
に、以前から、ＬＳＩなどの半導体素子チップを、其の
接続用リードパターンなどを形成させてある映画フィル
ム状のフレキシブルテープ（フレキシブル基板）上に予
め搭載して用いること（ＴＡＢ方式）が行なわれて来
た。この方式ではフレキシブル基板に搭載する半導体素
子はパッケージの無い所謂チップであって、１個ずつパ
ッケージに封入した場合に比べて小型化には非常に有利
である。フレキシブル基板上で、半導体素子チップ側の
端子間距離は非常に短いが、フレキシブル基板上の接続
用リードパターンによって、他の回路と接続する箇所で
は通常のパッケージに封入した半導体素子の端子の場合
と同程度に広くなっている。液晶表示装置の駆動回路
に、小型化のために上記のようなフレキシブル基板上に
装着した半導体素子を利用することは、勿論従来から行
なわれていたが、ただフレキシブル基板方式を利用する
だけでは、上記液晶表示装置の小型化のためには不十分
であった。In recent years, as the display surface of the liquid crystal display element has become larger and complicated display has been performed, the number of the above circuit components has also increased, which corresponds to a frame other than the display screen of the liquid crystal display device. A large area is required for the portion, and it has become difficult to reduce the size of the liquid crystal display device. On the other hand, in order to manufacture electronic devices efficiently and mass-produced using a semiconductor element, a semiconductor element chip such as an LSI is conventionally formed by attaching a semiconductor device chip such as an LSI to a movie film-like flexible tape (a lead film for connecting the chip). (TAB method) that has been mounted in advance on a flexible substrate). In this method, the semiconductor element mounted on the flexible substrate is a so-called chip without a package, which is very advantageous for miniaturization as compared with a case where the semiconductor element is sealed in a package one by one. On a flexible board, the distance between the terminals on the semiconductor element chip side is very short, but the connection lead pattern on the flexible board makes it possible to connect to other circuits with the terminals of a semiconductor element enclosed in a normal package. It is almost as wide. The use of a semiconductor element mounted on a flexible substrate as described above for the purpose of miniaturization in a drive circuit of a liquid crystal display device has been conventionally performed, of course. It is not sufficient for downsizing the liquid crystal display device.
【０００４】このため、液晶表示装置の小型化のために
種々の提案が行なわれており、例えば、実開昭６１−１
５５８８０号公報には、図４に示すように、上記フレキ
シブル基板を折り曲げて実装し、表示画面の周囲の額縁
部分を狭くすることが開示されている。但し、図４の中
で、１は単層の通常の回路基板、２はフレキシブル基
板、３は液晶表示素子である。[0004] For this reason, various proposals have been made to reduce the size of the liquid crystal display device.
Japanese Patent Laid-Open No. 55880 discloses that the flexible substrate is bent and mounted to narrow a frame portion around a display screen as shown in FIG. However, in FIG. 4, 1 is a single-layer normal circuit board, 2 is a flexible board, and 3 is a liquid crystal display element.
【０００５】[0005]
【発明が解決しようとする課題】上記従来の小型化技術
では、複数のフレキシブル基板上の接続用リードパター
ンの端子同士を接続して信号を仲介させる回路基板とし
て、基板の表裏に銅箔配線による回路を形成させ、必要
に応じて半導体素子も搭載した単層基板が使用されてお
り、この単層回路基板に、信号線、電源線など多数の配
線を配置するためには１０〜１５ｍｍの幅が必要で、上
記表示画面の周囲外部の額縁が広くなっていた。In the above-described conventional miniaturization technology, a circuit board for connecting terminals of connection lead patterns on a plurality of flexible substrates to mediate signals is provided by copper foil wiring on the front and back of the substrate. A single-layer board on which circuits are formed and semiconductor elements are mounted as necessary is used. In order to arrange a large number of wirings such as signal lines and power supply lines on this single-layer circuit board, a width of 10 to 15 mm is used. And the outside frame around the display screen is wide.
【０００６】本発明は上記表示画面周囲の額縁部分の幅
を狭くした液晶表示装置を提供することを目的とする。An object of the present invention is to provide a liquid crystal display device in which the width of a frame around the display screen is reduced.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明においては、液晶表示素子と此れを駆動するた
めのＬＳＩが搭載された複数のフレキシブル基板、及び
これらのフレキシブル基板同士の間を電気的に接続する
回路基板を備えた液晶表示装置において、前記回路基板
として、従来の単層基板の代りに、多層基板を用いるこ
とにした。In order to achieve the above object, according to the present invention, there are provided a plurality of flexible substrates on which a liquid crystal display element and an LSI for driving the same are mounted, and a plurality of flexible substrates between the flexible substrates. In a liquid crystal display device provided with a circuit board for electrically connecting the circuit board, a multilayer board is used as the circuit board instead of a conventional single-layer board.
【０００８】[0008]
【作用】フレキシブル基板の入力信号線を４〜１０本ず
つに分割し、それぞれ多層回路基板の各層に配置する。
１本の信号線の幅を０．１〜０．３ｍｍとし、各線の間
の間隔を０．１ｍｍ以上としても、上記多層回路基板の
幅を５ｍｍ以下にすることが出来る。The input signal lines of the flexible substrate are divided into four to ten lines, each of which is arranged on each layer of the multilayer circuit board.
Even if the width of one signal line is 0.1 to 0.3 mm and the interval between the lines is 0.1 mm or more, the width of the multilayer circuit board can be 5 mm or less.
【０００９】[0009]
【実施例】図１は本発明を反射形液晶表示装置に適用し
た実施例の平面図である。液晶表示素子３のガラス基板
の周囲の接続端子に、駆動用ＬＳＩを搭載したフレキシ
ブル基板２を異方性導電膜により接続し、フレキシブル
基板２を多層回路基板１ａに半田付けにより接続する。FIG. 1 is a plan view showing an embodiment in which the present invention is applied to a reflection type liquid crystal display device. A flexible substrate 2 on which a driving LSI is mounted is connected to connection terminals around a glass substrate of the liquid crystal display element 3 by an anisotropic conductive film, and the flexible substrate 2 is connected to the multilayer circuit board 1a by soldering.
【００１０】図２は図１中に示すＡ−Ａ’線による多層
回路基板１ａの断面図である。また、図５は多層基板内
部の接続を示す構造図である。絶縁性基板５の両面に銅
箔４を形成し、所定の信号線をエッチング加工により形
成したのち接着剤６で張り合わせ、スルーホール９を形
成して多層信号線間の接続を行ない、フレキシブル基板
の入力信号と対応する回路基板１ａ上の信号線を接続す
る。本実施例では、多層回路基板１ａの一方の表面に
は、フレキシブル基板の入力信号のパッドを配置し、他
の面には表示データ線、制御信号線を配置し、内層に
は、電源およびバイアス電圧線を配置した。内層に電源
線、バイアス電圧線を設けることにより、これらの線幅
を広くすることが可能となり、スルーホール９が貫通す
るクリアランス１０を設けることも容易になり有効であ
る。FIG. 2 is a sectional view of the multilayer circuit board 1a taken along the line AA 'shown in FIG. FIG. 5 is a structural diagram showing connections inside the multilayer substrate. A copper foil 4 is formed on both sides of an insulating substrate 5, a predetermined signal line is formed by etching, then bonded with an adhesive 6, a through hole 9 is formed, and connection between the multilayer signal lines is performed. The signal lines on the circuit board 1a corresponding to the input signals are connected. In this embodiment, pads for input signals of a flexible substrate are arranged on one surface of the multilayer circuit board 1a, display data lines and control signal lines are arranged on the other surface, and power supply and bias are arranged on the inner layer. Voltage lines were arranged. By providing the power supply line and the bias voltage line in the inner layer, it becomes possible to increase the width of these lines, and it is easy and effective to provide the clearance 10 through which the through hole 9 penetrates.
【００１１】図３は本発明を透過形液晶表示装置に適用
した実施例の断面図である。透過形液晶表示素子３ａ
に、駆動用ＬＳＩを搭載したフレキシブル基板２を異方
性導電膜で接続し、前記フレキシブル基板２に回路基板
１ａを半田付けで接続し、背面にバックライト７を実装
し、ケース８で固定することにより薄型、軽量で、明る
く見易い液晶表示装置が得られる。FIG. 3 is a sectional view of an embodiment in which the present invention is applied to a transmission type liquid crystal display device. Transmissive liquid crystal display element 3a
Then, a flexible substrate 2 on which a driving LSI is mounted is connected by an anisotropic conductive film, a circuit board 1a is connected to the flexible substrate 2 by soldering, a backlight 7 is mounted on the back surface, and fixed by a case 8. As a result, a thin, lightweight, bright and easy-to-see liquid crystal display device can be obtained.
【００１２】[0012]
【発明の効果】以上説明したように本発明によれば、回
路基板を従来の単層から多層に変えることにより基板の
幅を狭くすることが可能となり、液晶表示装置の表示画
面周囲の額縁部分の幅を狭くでき、表示画面は大きく、
その割には表示装置の外形は小さく、軽量、薄型の液晶
表示装置が得られる。As described above, according to the present invention, the width of the circuit board can be reduced by changing the circuit board from the conventional single layer to the multilayer, and the frame portion around the display screen of the liquid crystal display device can be obtained. Can be narrowed, the display screen is large,
For this reason, a light-weight and thin liquid crystal display device having a small external shape can be obtained.
【図１】本発明を反射形液晶表示装置に適用した実施例
の平面図である。FIG. 1 is a plan view of an embodiment in which the present invention is applied to a reflection type liquid crystal display device.
【図２】同実施例に用いた多層回路基板の断面図であ
る。FIG. 2 is a sectional view of a multilayer circuit board used in the embodiment.
【図３】本発明を透過形液晶表示装置に適用した実施例
の断面図である。FIG. 3 is a sectional view of an embodiment in which the present invention is applied to a transmission type liquid crystal display device.
【図４】フレキシブル基板を折り曲げて使用した従来の
液晶表示装置の断面図である。FIG. 4 is a cross-sectional view of a conventional liquid crystal display device using a flexible substrate bent.
【図５】多層基板内部の接続を示す構造図である。FIG. 5 is a structural diagram showing connections inside a multilayer substrate.
【符合の説明】１…（単層）回路基板 １ａ…多層回路基板 ２…フレキシブル基板 ３…反射形液晶表示素子 ３ａ…透過形液晶表示素子 ４…銅箔 ５…絶縁性基板 ６…接着剤 ７…バックライト ８…ケース ９…スルーホール １０…クリアランス[Description of Symbols] 1 ... (single layer) circuit board 1a ... multilayer circuit board 2 ... flexible board 3 ... reflective liquid crystal display element 3a ... transmissive liquid crystal display element 4 ... copper foil 5 ... insulating substrate 6 ... adhesive 7 ... backlight 8 ... case 9 ... through hole 10 ... clearance
フロントページの続き (72)発明者 鈴木 仁志 千葉県茂原市早野3300番地 株式会社 日立製作所茂原工場内 (72)発明者 井浦 孝之 千葉県茂原市早野3300番地 株式会社 日立製作所茂原工場内 (56)参考文献 特開 平３−17628（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G02F 1/1333 G02F 1/1345 Continuing on the front page (72) Inventor Hitoshi Suzuki 3300 Hayano Mobara-shi, Chiba Prefecture Inside Mobara Factory, Hitachi, Ltd. Document JP-A-3-17628 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) G02F 1/1333 G02F 1/1345
Claims (4)
るＬＳＩが搭載されている複数のフレキシブル基板と、
該フレキシブル基板同志の間を電気的に接続する回路基
板とを備えた液晶表示装置において、前記回路基板とし
て多層回路基板を用い、 前記多層回路基板は、少なくとも前記フレキシブル基板
に接続される第１の表面配線が形成された第１配線基板
と、第２の表面配線が形成された第２配線基板とからな
り、前記第１配線基板と前記第２配線基板との間の内層
に設けられた内層配線には電源線またはバイアス配線が
配置されている ことを特徴とする液晶表示装置。1. A liquid crystal display device and a device for driving the liquid crystal display device
A plurality of flexible substrate LSI is mounted that,
The liquid crystal display device and a circuit board for electrically connecting between the flexible substrate comrades, a multilayer circuit board as the circuit board, the multilayer circuit board, at least the flexible substrate
Wiring board having a first surface wiring connected to the first wiring board
And the second wiring board on which the second surface wiring is formed.
And an inner layer between the first wiring board and the second wiring board.
The power supply line or bias line is
A liquid crystal display device which is arranged .
るＬＳＩが搭載されている複数のフレキシブル基板と、
該フレキシブル基板同志の間を電気的に接続する回路基
板とを備えた液晶表示装置において、前記回路基板とし
て多層回路基板を用い、 前記多層回路基板は、少なくとも前記フレキシブル基板
に接続される第１の表面配線が形成された第１配線基板
と、第２の表面配線が形成された第２配線基板とからな
り、前記第１配線基板と前記第２配線基板との間の内層
に設けられた内層配線には電源線またはバイアス配線が
配置され、 前記液晶表示素子の背面にバックライトが配置されてい
ることを特徴とする透過型の液晶表示装置。2. A liquid crystal display device and a device for driving the liquid crystal display device.
A plurality of flexible substrate LSI is mounted that,
The liquid crystal display device and a circuit board for electrically connecting between the flexible substrate comrades, a multilayer circuit board as the circuit board, the multilayer circuit board, at least the flexible substrate
Wiring board having a first surface wiring connected to the first wiring board
And the second wiring board on which the second surface wiring is formed.
And an inner layer between the first wiring board and the second wiring board.
The power supply line or bias line is
A transmissive liquid crystal display device , wherein a backlight is disposed on a rear surface of the liquid crystal display element.
１及び第２の表面配線より線幅の広い配線であることを
特徴とする請求項１あるいは２に記載の液晶表示装置。 3. The power supply line or the bias line, wherein:
Make sure that the wiring is wider than the first and second surface wiring.
The liquid crystal display device according to claim 1 or 2, wherein:
同一のケース内に収納されたことを特徴とする請求項２
に記載の液晶表示装置。 4. The multi-layer circuit board and the backlight according to claim 1,
3. The device according to claim 2, wherein the components are housed in the same case.
3. The liquid crystal display device according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3047869A JP2920843B2 (en) | 1991-03-13 | 1991-03-13 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3047869A JP2920843B2 (en) | 1991-03-13 | 1991-03-13 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04283722A JPH04283722A (en) | 1992-10-08 |
| JP2920843B2 true JP2920843B2 (en) | 1999-07-19 |
Family
ID=12787384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3047869A Expired - Lifetime JP2920843B2 (en) | 1991-03-13 | 1991-03-13 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2920843B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69325216T2 (en) * | 1992-09-08 | 1999-12-09 | Seiko Epson Corp., Tokio/Tokyo | Liquid crystal display device, device and method for assembling semiconductor elements and electronic printing device |
| JP3263705B2 (en) * | 1995-09-21 | 2002-03-11 | 三菱電機株式会社 | Printed wiring board and flat panel display driving circuit printed wiring board and flat panel display device |
| JPH09120079A (en) * | 1995-10-26 | 1997-05-06 | Hitachi Ltd | Liquid crystal display device |
| KR100706738B1 (en) * | 2000-09-08 | 2007-04-11 | 삼성전자주식회사 | Display unit for a flat panel display apparatus |
-
1991
- 1991-03-13 JP JP3047869A patent/JP2920843B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04283722A (en) | 1992-10-08 |
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