JPH081499B2 - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JPH081499B2 JPH081499B2 JP15793A JP15793A JPH081499B2 JP H081499 B2 JPH081499 B2 JP H081499B2 JP 15793 A JP15793 A JP 15793A JP 15793 A JP15793 A JP 15793A JP H081499 B2 JPH081499 B2 JP H081499B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- electrodes
- electrode
- circuit board
- crystal panel
- 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
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)
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
に狭ピッチ対応の高精細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 high-definition liquid crystal display device compatible with a narrow pitch.
【０００２】[0002]
【従来の技術】従来、回路基板を両面基板とし、ＩＣチ
ップを両面に搭載してメモリーカードを構成したり（特
開平２−２８６３９９号公報参照）、また混成集積回路
装置に適用し（特開平２−２１０７７４号公報参照）装
置の小型化に対応する技術が知られている。2. Description of the Related Art Conventionally, a circuit board is a double-sided board and IC chips are mounted on both sides to form a memory card (see Japanese Patent Application Laid-Open No. 2-286399), and it is also applied to a hybrid integrated circuit device (Japanese Patent Application Laid-Open No. Hei. (See Japanese Patent Laid-Open No. 2-210774) There is known a technique corresponding to miniaturization of the device.
【０００３】しかしながら、従来の液晶表示装置におい
ては、図４に示すように、液晶パネル基板１に接続され
る回路基板３２は片面基板で、駆動用ＩＣ３は片面にの
み搭載されていた。However, in the conventional liquid crystal display device, as shown in FIG. 4, the circuit board 32 connected to the liquid crystal panel board 1 is a single-sided board, and the driving IC 3 is mounted on only one side.
【０００４】[0004]
【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、表示画面の高精細化に伴い液晶パネル基板に形
成された電極数が増大し、電極間ピッチが狭くなると異
方性導電テープにより回路基板の電極と熱圧着する部分
の電極間ピッチも狭くなる。このため接続に必要となる
端子の電極幅が狭くなり、切断によりオープンとなる発
生率が高くなるとともに、電極間間隔が狭くなることに
より電極間ショートの発生率が高くなり、歩留りが低く
なるという問題点があった。In this conventional liquid crystal display device, as the number of electrodes formed on the liquid crystal panel substrate increases as the display screen becomes finer and the pitch between the electrodes becomes narrower, anisotropic conductive tape is used. The pitch between the electrodes of the circuit board where the electrodes are thermocompression bonded is also narrowed. For this reason, the electrode width of the terminals required for connection is narrowed, the incidence of opening due to disconnection is high, and the spacing between electrodes is narrow, the incidence of interelectrode shorts is high, and the yield is low. There was a problem.
【０００５】本発明の目的は、端子のオープンや端子間
ショートの発生がなく、高精細化に伴う電極間の狭ピッ
チ化に対応できる歩留の高い液晶表示装置を提供するこ
とにある。It is an object of the present invention to provide a liquid crystal display device having a high yield which does not cause terminal opening or short circuit between terminals and can cope with a narrower pitch between electrodes which accompanies higher definition.
【０００６】[0006]
【課題を解決するための手段】本発明の液晶表示装置
は、 （１）周辺部に複数の電極列を備えた液晶パネル基板
と、両面に少くとも２個の駆動用ＩＣが搭載されこれら
駆動用ＩＣに配線を介して接続された電極列を備えた回
路基板とを有し、前記回路基板の一方の面の電極列の電
極は異方性導電テープを介して前記液晶パネル基板の一
方の電極列の電極に接続され、前記回路基板の他方の面
の電極列の電極はフレキシブルプリント板と異方性導電
テープを介して前記液晶パネル基板の他方の電極列の電
極に接続されている。A liquid crystal display device according to the present invention is provided with (1) a liquid crystal panel substrate having a plurality of electrode rows in its peripheral portion, and at least two driving ICs mounted on both sides thereof. Circuit board having an electrode array connected to the IC for wiring through wiring, and the electrodes of the electrode array on one surface of the circuit board are provided on one side of the liquid crystal panel substrate via an anisotropic conductive tape. The electrode of the electrode array on the other surface of the circuit board is connected to the electrode of the electrode array on the other surface of the liquid crystal panel substrate via the flexible printed board and the anisotropic conductive tape.
【０００７】（２）周辺部に複数の電極列を備えた液晶
パネル基板と、両面に少なくとも２個の駆動用ＩＣが搭
載されており一方の面の前記駆動用ＩＣに配線を介して
接続された少くとも１列の電極列と他方の面に搭載され
た駆動用ＩＣに配線およびスルーホールを介して前記電
極列が設けられた面と同一面上に配置された少くとも１
列の電極列を備えた回路基板とを有し、前記回路基板の
それぞれの電極列の電極が異方性導電テープを介して対
応する前記液晶パネル基板の電極列の電極に接続されて
いる。(2) A liquid crystal panel substrate having a plurality of electrode rows on the periphery and at least two driving ICs on both sides are mounted and connected to the driving ICs on one side via wiring. At least one electrode array and at least one electrode array disposed on the same surface as the surface on which the electrode array is provided via wiring and through holes in the driving IC mounted on the other surface
And a circuit board having a row of electrode rows, and the electrodes of the respective electrode rows of the circuit board are connected to the corresponding electrodes of the electrode rows of the liquid crystal panel substrate via an anisotropic conductive tape.
【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の実施例の液晶パネル
基板と回路基板との接続部の断面図である。第１の実施
例は図１に示すように表裏両面に配線とこの配線に接続
する電極列の電極（いずれも図示せず）とが形成された
両面回路基板２で、配線に接続して両面に駆動用ＩＣ３
が搭載されている。FIG. 1 is a sectional view of a connecting portion between a liquid crystal panel substrate and a circuit substrate according to a first embodiment of the present invention. The first embodiment is a double-sided circuit board 2 in which wirings and electrodes (not shown) of an electrode array connected to the wirings are formed on both front and back surfaces as shown in FIG. Drive IC3
Is installed.
【００１０】一方、液晶パネル基板１には外周部に二列
の電極列が形成され、それぞれの液晶パネル基板の電極
列の電極は配線（いずれも図示せず）を介して表示部に
接続されている。回路基板２の裏面の電極列は異方性導
電テープ４を介して液晶パネル基板１の外側の電極列の
電極に直接接続されている。回路基板２の表面の電極列
の電極は異方性導電テープ４を介してフレキシブルプリ
ント板５の一端に接続され、さらにフレキシブルプリン
ト板５の他端は異方性導電テープ４を介して液晶パネル
基板１の内側の電極列の電極に接続されている。On the other hand, on the liquid crystal panel substrate 1, two rows of electrodes are formed on the outer peripheral portion, and the electrodes of the respective rows of electrodes of the liquid crystal panel substrate are connected to the display section through wiring (neither is shown). ing. The electrode array on the back surface of the circuit board 2 is directly connected to the electrodes of the electrode array on the outer side of the liquid crystal panel substrate 1 via the anisotropic conductive tape 4. The electrodes of the electrode array on the surface of the circuit board 2 are connected to one end of the flexible printed board 5 via the anisotropic conductive tape 4, and the other end of the flexible printed board 5 is connected to the liquid crystal panel via the anisotropic conductive tape 4. It is connected to the electrodes of the electrode array inside the substrate 1.
【００１１】液晶表示装置をこのような接続構造にする
ことにより、表示画面の高精細化に伴い液晶パネル基板
１の表示部の電極間ピッチが狭くなっても液晶パネル基
板の電極列の電極間ピッチを表示部の電極間ピッチの２
倍のピッチとすることが可能となる。現状の熱圧着接続
法で可能な電極間ピッチの限界は約１００μｍであるの
で、本実施例では、実質５０μｍの電極間ピッチの圧着
接続が可能となる。With such a connection structure of the liquid crystal display device, even if the pitch between electrodes of the display portion of the liquid crystal panel substrate 1 becomes narrower as the display screen becomes finer, the distance between the electrodes of the electrode row of the liquid crystal panel substrate becomes smaller. The pitch is 2 of the pitch between electrodes on the display.
The pitch can be doubled. Since the limit of the inter-electrode pitch that can be achieved by the current thermocompression bonding method is about 100 μm, the present embodiment enables crimp connection with an inter-electrode pitch of substantially 50 μm.
【００１２】図２（ａ），（ｂ）は本発明の第２の実施
例の液晶パネル基板と回路基板との接続部の断面図およ
びその回路基板の圧接面の平面図である。第２の実施例
は、図２（ａ），（ｂ）に示すように、表裏両面に配線
と表裏両面の配線を接続するスルーホール６を有する両
面スルーホール回路基板１２で、裏面の圧接面には第１
の電極列７と第２の電極列８が形成され、裏面の駆動用
ＩＣ３に接続する配線は直接第２の電極列８の電極に、
また表面の駆動用ＩＣ３に接続する配線はスルーホール
６を介して裏面の第１の電極列７の電極に接続されてい
る。2 (a) and 2 (b) are a sectional view of a connecting portion between a liquid crystal panel substrate and a circuit board according to a second embodiment of the present invention and a plan view of a pressure contact surface of the circuit board. As shown in FIGS. 2A and 2B, the second embodiment is a double-sided through-hole circuit board 12 having through-holes 6 for connecting wiring on both front and back surfaces and a wiring on both front and back surfaces. Is the first
The electrode row 7 and the second electrode row 8 are formed, and the wiring connected to the driving IC 3 on the back surface is directly connected to the electrode of the second electrode row 8.
The wiring connected to the driving IC 3 on the front surface is connected to the electrodes of the first electrode array 7 on the back surface through the through holes 6.
【００１３】一方、液晶パネル基板１の周辺部には、回
路基板の第１の電極列７と第２の電極列８と対応する位
置に二列の電極列が形成され、それぞれの電極列の電極
は配線を介して表示部に接続されている。回路基板１２
の第１の実施例７の電極と第２の電極列８の電極は液晶
パネル基板１のそれぞれ対応する電極列の電極に異方性
導電テープ４を介して接続されている。On the other hand, in the peripheral portion of the liquid crystal panel substrate 1, two electrode rows are formed at positions corresponding to the first electrode row 7 and the second electrode row 8 of the circuit board. The electrodes are connected to the display unit via wiring. Circuit board 12
The electrodes of the first embodiment 7 and the electrodes of the second electrode array 8 are connected to the electrodes of the corresponding electrode array of the liquid crystal panel substrate 1 via the anisotropic conductive tape 4.
【００１４】液晶表示装置をこのような構造にすること
により、図１に示す第１の実施例のフレキシブルプリン
ト板５とフレキシブルプリント板５の熱圧着工程を省く
ことができるので、液晶表示装置の製造コストを低減で
きる効果がある。By forming the liquid crystal display device with such a structure, the flexible printed board 5 of the first embodiment shown in FIG. 1 and the thermocompression bonding process of the flexible printed board 5 can be omitted. This has the effect of reducing manufacturing costs.
【００１５】図３（ａ），（ｂ）は本発明の第３の実施
例の液晶パネル基板と回路基板との接続部の断面図およ
びその回路基板の圧接面の平面図である。第３の実施例
は、図３（ａ），（ｂ）に示すように、第２の実施例と
同様表裏両面に配線と表裏両面の配線を接続するスルー
ホール６を有する両面スルーホール回路基板２２で裏面
の圧接面には第１の電極列７と第２の電極列８と第３の
電極列９が形成され裏面に１個の駆動用ＩＣ３が、表面
には２個の駆動用ＩＣ３が搭載されている。裏面の駆動
用ＩＣ３に接続する配線は直接第３の電極列９の電極
に、表面の２個の駆動用ＩＣ３に接続する配線はそれぞ
れスルーホール６を介して第１の電極列７の電極と第２
の電極８の電極に接続されている。3 (a) and 3 (b) are a sectional view of a connecting portion between a liquid crystal panel substrate and a circuit board according to a third embodiment of the present invention and a plan view of a pressure contact surface of the circuit board. The third embodiment, as shown in FIGS. 3A and 3B, is a double-sided through-hole circuit board having through holes 6 for connecting wirings on both front and back surfaces, as in the second embodiment. At 22, the first electrode array 7, the second electrode array 8 and the third electrode array 9 are formed on the pressure contact surface of the back surface, and one drive IC 3 is provided on the back surface, and two drive ICs 3 are provided on the front surface. Is installed. The wirings connected to the driving ICs 3 on the back surface are directly connected to the electrodes of the third electrode row 9, and the wirings connected to the two driving ICs 3 on the front surface are connected to the electrodes of the first electrode row 7 through the through holes 6. Second
Is connected to the electrode of the electrode 8.
【００１６】一方、液晶パネル基板１の周辺部には、回
路基板２２の第１，第２，第３の電極列７，８，９と対
応する位置に三列の電極列が形成され、それぞれの電極
列の電極は配線を介して表示部に接続されている。回路
基板２２の三列の電極列７，８，９のそれぞれの電極は
対応する液晶パネル基板１の電極列の電極に異方性導電
テープ４を介して接続される。On the other hand, in the peripheral portion of the liquid crystal panel substrate 1, three rows of electrodes are formed at positions corresponding to the first, second and third rows of electrodes 7, 8, 9 of the circuit board 22, respectively. The electrodes of the electrode array of are connected to the display unit via wiring. The electrodes of the three rows of electrodes 7, 8 and 9 on the circuit board 22 are connected to the corresponding electrodes of the row of electrodes on the liquid crystal panel substrate 1 through the anisotropic conductive tape 4.
【００１７】液晶表示装置をこのような構造にすること
により、第１の実施例および第２の実施例に比べ、さら
に狭ピッチに対応できることになり本実施例では実質
（１００／３）＝３３μｍピッチの接続が可能になる。
さらに電極列の数をｎ列に増すことにより実質（１００
／ｎ）μｍピッチの接続が可能となる。By adopting such a structure for the liquid crystal display device, it is possible to cope with a narrower pitch as compared with the first and second embodiments, and in this embodiment, substantially (100/3) = 33 μm. Pitch connection is possible.
Furthermore, by increasing the number of electrode rows to n rows,
/ N) μm pitch connection is possible.
【００１８】[0018]
【発明の効果】以上説明したように本発明は、両面回路
基板を用い、一方、液晶パネル基板の表面に複数列の電
極列を形成し、回路基板の裏面の電極列の電極は異方性
導電テープを介して、表面の電極列の電極は異方性導電
テープとフレキシブルプリント板と異方性導電テープま
たはスルーホールを介して液晶パネル基板のそれぞれの
電極列の電極に接続することにより、表示画面の高精細
化による電極間の狭ピッチ化に対応し画像品質を高める
ことができるという効果がある。As described above, according to the present invention, a double-sided circuit board is used, and on the other hand, a plurality of rows of electrodes are formed on the front surface of the liquid crystal panel substrate, and the electrodes on the back side of the circuit board are anisotropic. Through the conductive tape, the electrodes of the electrode array on the surface are connected to the electrodes of the respective electrode arrays of the liquid crystal panel substrate through the anisotropic conductive tape, the flexible printed board, and the anisotropic conductive tape or through holes, There is an effect that the image quality can be improved in response to the narrowing of the pitch between the electrodes due to the higher definition of the display screen.
【００１９】従来の圧着接続法で可能な電極間ピッチの
限界は約１００μｍであったが、それぞれの電極列を二
列にすることにより、実質５０μｍピッチ、さらにそれ
ぞれの電極列を三列にすることにより、実質３３μｍピ
ッチの接続が可能となる。The limit of the pitch between electrodes which can be obtained by the conventional crimp connection method is about 100 μm, but by making each electrode row two rows, the pitch is substantially 50 μm, and each electrode row is made three rows. As a result, it becomes possible to connect with a pitch of substantially 33 μm.
【００２０】また、導電性異物による電極間ショートの
発生率も電極間ピッチを大きくできるので減少し、製造
歩留を向上できる効果がある。Further, the rate of occurrence of short circuit between electrodes due to conductive foreign matter can be decreased because the pitch between electrodes can be increased, and there is an effect that the manufacturing yield can be improved.
【図１】本発明の第１の実施例の液晶パネル基板と回路
基板との接続部の断面図である。FIG. 1 is a sectional view of a connecting portion between a liquid crystal panel substrate and a circuit substrate according to a first embodiment of the present invention.
【図２】（ａ），（ｂ）は本発明の第２の実施例の液晶
パネル基板と回路基板との接続部の断面図およびその回
路基板の圧接面の平面図である。2A and 2B are a cross-sectional view of a connecting portion between a liquid crystal panel substrate and a circuit board according to a second embodiment of the present invention and a plan view of a pressure contact surface of the circuit board.
【図３】（ａ），（ｂ）は本発明の第３の実施例の液晶
パネル基板と回路基板との接続部の断面図およびその回
路基板の圧接面の平面図である。3 (a) and 3 (b) are a sectional view of a connecting portion between a liquid crystal panel substrate and a circuit board according to a third embodiment of the present invention and a plan view of a pressure contact surface of the circuit board.
【図４】従来の液晶表示装置の液晶パネル基板と回路基
板との接続部の一例の断面図である。FIG. 4 is a cross-sectional view of an example of a connecting portion between a liquid crystal panel substrate and a circuit substrate of a conventional liquid crystal display device.
１ 液晶パネル基板 ２，１２，２２，３２ 回路基板 ３ 駆動用ＩＣ ４ 異方性導電テープ ５ フレキシブルプリント板 ６ スルーホール ７ 第１の電極列 ８ 第２の電極列 ９ 第３の電極列 1 Liquid Crystal Panel Substrate 2, 12, 22, 32 Circuit Board 3 Driving IC 4 Anisotropic Conductive Tape 5 Flexible Printed Board 6 Through Hole 7 First Electrode Row 8 Second Electrode Row 9 Third Electrode Row
Claims (2)
ル基板と、両面に少くとも２個の駆動用ＩＣが搭載され
これら駆動用ＩＣに配線を介して接続された電極列を備
えた回路基板とを有し、前記回路基板の一方の面の電極
列の電極は異方性導電テープを介して前記液晶パネル基
板の一方の電極列の電極に接続され、前記回路基板の他
方の面の電極列の電極はフレキシブルプリント板と異方
性導電テープを介して前記液晶パネル基板の他方の電極
列の電極に接続されていることを特徴とする液晶表示装
置。1. A liquid crystal panel substrate having a plurality of electrode rows on its periphery, and at least two driving ICs on both sides thereof, and an electrode row connected to these driving ICs via wiring. A circuit board, the electrodes of the electrode array on one surface of the circuit board are connected to the electrodes of the electrode array on one side of the liquid crystal panel board via an anisotropic conductive tape, and the other surface of the circuit board is connected. 2. The liquid crystal display device, wherein the electrode of the electrode array is connected to the electrode of the other electrode array of the liquid crystal panel substrate via a flexible printed board and an anisotropic conductive tape.
ル基板と、両面に少なくとも２個の駆動用ＩＣが搭載さ
れており一方の面の前記駆動用ＩＣに配線を介して接続
された少くとも１列の電極列と他方の面に搭載された駆
動用ＩＣに配線およびスルーホールを介して前記電極列
が設けられた面と同一面上に配置された少くとも１列の
電極列を備えた回路基板とを有し、前記回路基板のそれ
ぞれの電極列の電極が異方性導電テープを介して対応す
る前記液晶パネル基板の電極列の電極に接続されている
ことを特徴とする液晶表示装置。2. A liquid crystal panel substrate having a plurality of electrode rows in the peripheral portion, and at least two driving ICs mounted on both sides, which are connected to the driving ICs on one surface via wiring. At least one row of electrodes and at least one row of electrodes arranged on the same surface as the surface on which the row of electrodes is provided via wiring and through holes in the driving IC mounted on the other side. A liquid crystal having a circuit board provided, wherein the electrodes of each electrode array of the circuit board are connected to corresponding electrodes of the electrode array of the liquid crystal panel substrate via an anisotropic conductive tape. Display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15793A JPH081499B2 (en) | 1993-01-05 | 1993-01-05 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15793A JPH081499B2 (en) | 1993-01-05 | 1993-01-05 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06202135A JPH06202135A (en) | 1994-07-22 |
| JPH081499B2 true JPH081499B2 (en) | 1996-01-10 |
Family
ID=11466209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15793A Expired - Fee Related JPH081499B2 (en) | 1993-01-05 | 1993-01-05 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH081499B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001077501A (en) * | 1999-09-03 | 2001-03-23 | Seiko Epson Corp | Flexible wiring board, optoelectronic device and electronic apparatus |
| EP1085788A3 (en) | 1999-09-14 | 2003-01-02 | Seiko Epson Corporation | Composite flexible wiring board, method of manufacturing the same, electro-optical device, and electronic equipment |
| AU2001294908A1 (en) * | 2000-10-03 | 2002-04-15 | Three-Five Systems, Inc. | High-density wire bond microdisplay |
| KR101248003B1 (en) | 2006-05-09 | 2013-03-27 | 엘지디스플레이 주식회사 | The substrate for LCD and method for fabricating of the same |
| JP5035519B2 (en) * | 2007-02-22 | 2012-09-26 | ブラザー工業株式会社 | Circuit element mounting flexible wiring material |
-
1993
- 1993-01-05 JP JP15793A patent/JPH081499B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06202135A (en) | 1994-07-22 |
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