JPH04131892A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH04131892A JPH04131892A JP25323290A JP25323290A JPH04131892A JP H04131892 A JPH04131892 A JP H04131892A JP 25323290 A JP25323290 A JP 25323290A JP 25323290 A JP25323290 A JP 25323290A JP H04131892 A JPH04131892 A JP H04131892A
- Authority
- JP
- Japan
- Prior art keywords
- inspection
- signal
- liquid crystal
- carry signal
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims description 12
- 238000007689 inspection Methods 0.000 abstract description 11
- 230000002950 deficient Effects 0.000 abstract description 9
- 239000000758 substrate Substances 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 abstract 2
- 238000004806 packaging method and process Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 8
- 230000005856 abnormality Effects 0.000 description 5
- 239000010408 film Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001465382 Physalis alkekengi Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明ハ、薄膜トランジヌタをスイッチング素子として
もちいたアクティブ・マトリクヌ型液晶表示装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an active matrix liquid crystal display device using thin film transistors as switching elements.
従来の技術
近年、微細加工技術、液晶材料、及び実装技術の進歩に
より、１〜６インチ程度の小型サイズではあるが良好な
テレビ画像を得られる液晶表示装置が商業ベースで生産
されるようになってきている。Conventional technology In recent years, advances in microfabrication technology, liquid crystal materials, and packaging technology have led to the commercial production of liquid crystal display devices that are small in size, about 1 to 6 inches, but can provide good television images. It's coming.
このような液晶表示装置は、スイッチング素子を備えた
画像表示部に走査信号とデータ信号を供給するだめ、外
部から駆動用ＩＣを接続する必要があるが、その接続方
法は次の２つが主流である。In order to supply scanning signals and data signals to an image display section equipped with a switching element, such a liquid crystal display device needs to connect a driving IC from the outside, but the following two methods are mainstream for this connection. be.
その１つは液晶表示装＠を構成する２つの透明基板のう
ち一方の基板上に形成された走査信号線の端子群及びデ
ータ信号線の端子群に、例えばポリイミド樹脂薄膜ベー
スに銅薄膜線を多数形成した接続フィルムを導電性接着
剤等で圧接して外部の駆動用ＩＣからの信号を供給する
いわゆるフィルムキャリア方式であり、もう１つは、液
晶表示装置を構成する一方の基板上の画像表示部周辺に
形成した実装端子に何らかの方法では直接駆動用ＩＣを
実装するｃｏＧ（チップ・オン・グラス）方式である。One of them is to connect the scanning signal line terminal group and the data signal line terminal group formed on one of the two transparent substrates that make up the liquid crystal display device@, for example, by using copper thin film wires on a polyimide resin thin film base. There is a so-called film carrier method in which a large number of connection films are pressed together using a conductive adhesive or the like to supply signals from an external driving IC. This is a coG (chip-on-glass) method in which a driving IC is directly mounted by some method on mounting terminals formed around the display section.
現在販売されている液晶テレビのほとんどは前者のフィ
ルムキャリア方式を採用したものであるが、ビデオカメ
ラのビューファインダーなどに使われる１インチ程度の
超小型液晶パネルなどでは、省スペースのために後者の
ＣＯＧ方式が採用されることか増えてきている。Most of the LCD TVs currently sold use the former film carrier method, but ultra-compact LCD panels of about 1 inch, used in video camera viewfinders, etc., use the latter method to save space. The COG method is increasingly being adopted.
発明が解決しようとする課題
しかしながら、上記のＣｏＧ実装方式を採用した場合、
ＩＣ入力信号実装部の接続抵抗が不安定であると画像表
示性能に悪影響をおよぼす。例えば、ラヌターストソプ
などの重大欠陥を引き起こすという問題があり、製造コ
ストの面から見ても駆動用ＩＣ実装のりベア可能有段階
での検査選別が必須である。しかし、実装部の接続抵抗
を検査確認するためには、従来は、実際に画像を表示さ
せて目視による検査に頼るしか方法がなく、またこの時
、画像性能に異常を発見したとしても画像表示部に問題
があるのか、駆動用ＩＣ実装部の接触不良が原因なのか
を判断することは困難であり、その後のＩＣ再実装など
のりベア処置時に大きなロスコストを発生させていた。Problems to be Solved by the Invention However, when the above CoG implementation method is adopted,
If the connection resistance of the IC input signal mounting section is unstable, image display performance will be adversely affected. For example, there is a problem that serious defects such as lanterns are caused, and from the point of view of manufacturing costs, it is essential to perform inspection and selection at a stage when the drive IC can be mounted and carried. However, in order to inspect and confirm the connection resistance of the mounting part, conventionally the only way to check was to actually display an image and rely on visual inspection. It is difficult to determine whether there is a problem with the drive IC mounting part or a poor contact in the drive IC mounting part, resulting in a large loss cost during subsequent glue bear treatment such as IC remounting.
課題を解決するための手段
上記問題点を解決するために本発明の液晶表示装置は、
カスケード接続した駆動用ＩＣのキャリー信号をＩＣ入
力信号供給配線を介してＩＣ実装領域外部に引出し、そ
の終端に検査用端子を設けたものである。Means for Solving the Problems In order to solve the above problems, the liquid crystal display device of the present invention has the following features:
The carry signals of the cascade-connected driving ICs are led out to the outside of the IC mounting area via IC input signal supply wiring, and a test terminal is provided at the end of the wiring.
作用
本発明は上記した構造によって、実装部の接続抵抗に最
も敏感であるＩＣのキャリー信号を引き出し、ＩＣ実装
後に画像表示による動作確認と共に、引き出した検査端
子に検査針を当てて電電的信号波形を測定機器で検査す
ることが可能となり、検査の結果、信号波形に異常が発
見された場合にはＩＣ実装部の接触不良、またはＩＣ不
良と判断し、ＩＣの実装リペアによって良品として復活
させることができ、また、信号に異常が無いにもかかわ
らず画像上に異常が発見された場合には、画像表示部の
不良と判断できるので無駄なＩＣ再実装を事前に避ける
ことが可能となりロスコストの削減が可能となる。Operation The present invention uses the above-described structure to draw out the carry signal of the IC, which is most sensitive to the connection resistance of the mounting part, and after the IC is mounted, the operation is confirmed by displaying an image, and the electrical signal waveform is measured by applying a test needle to the drawn out test terminal. If an abnormality is found in the signal waveform as a result of the inspection, it is determined that there is a poor contact in the IC mounting part or the IC is defective, and the IC can be restored as a good product by mounting repair. In addition, if an abnormality is found on the image even though there is no abnormality in the signal, it can be determined that the image display section is defective, making it possible to avoid wasteful re-installation of ICs and reducing loss costs. reduction is possible.
実施例
以下本発明の一実施例について、図面を参照しながら説
明する。第１図は本発明の実施例における液晶表示装置
の画像表示部及び周辺駆動用工Ｃ実装部を示した模式図
である。EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing an image display section and a peripheral drive C mounting section of a liquid crystal display device in an embodiment of the present invention.
第１図において、１はガラス基板、２はスイッチング素
子と走査配線及び信号配線をマ） ＩＪクス状に配列さ
せた画像表示部、３はＩＣ出力信号用実装端子群、４は
ＩＣ入力信号用実装端子群、６はＩＣ入力信号供給配線
、６．７はＸ方向駆動用ＩＣ，８，９はＹ方向駆動用Ｉ
Ｃ，１０はカスケード接続配線、１１〜１４はキャリー
信号検査端子、１５は外部信号入力端子群である。In Figure 1, 1 is a glass substrate, 2 is an image display section with switching elements, scanning wiring, and signal wiring arranged in an IJ box shape, 3 is a group of mounting terminals for IC output signals, and 4 is for IC input signals. Mounting terminal group, 6 is IC input signal supply wiring, 6.7 is X-direction driving IC, 8, 9 is Y-direction driving I
C and 10 are cascade connection wirings, 11 to 14 are carry signal test terminals, and 15 is a group of external signal input terminals.
以上のように構成された液晶表示装置において、駆動用
ＩＣ６〜９を実装端子群３．４にそれぞれ実装し、完全
にそれらの実装部を固定しない段階で画像検査と同時に
キャリー信号検査端子１１〜１４に検査針（図示せず）
をあて外部の検査機器（図示せず）で波形をチエツクし
、画像が正常である場合にはそのまま良品とし、画像が
異常である場合には、キャリー信号の波形を確認して、
その波形に異常が認められなければ画像表示部の不良で
あり、その液晶表示装置は不良と判定する。In the liquid crystal display device configured as described above, the drive ICs 6 to 9 are respectively mounted on the mounting terminal groups 3 and 4, and the carry signal test terminals 11 to 11 are mounted at the same time as the image inspection at the stage where the mounting parts are not completely fixed. Test needle at 14 (not shown)
Check the waveform with an external inspection device (not shown). If the image is normal, it is considered a good product. If the image is abnormal, check the carry signal waveform.
If no abnormality is recognized in the waveform, the image display section is defective, and the liquid crystal display device is determined to be defective.
また、波形に異常が認めら′ｒＬれば、駆動用ＩＣの不
良まだは実装部の接触不良と判断し、ＩＣ再実装のりベ
ア処置を施す。Furthermore, if an abnormality is found in the waveform, it is determined that the drive IC is defective or the mounting portion is defective in contact, and IC remounting and bare treatment is performed.
ここで、各ＩＣごとにキャリー信号を引き出しているの
は不良ＩＣを同定するためであわ、ＩＣ再実装を効率的
に行うことができる。Here, the reason why a carry signal is extracted for each IC is to identify a defective IC, and IC remounting can be performed efficiently.
発明の効果
以上のように本発明によれば、カスケード接続された駆
動用ＩＣからキャリー信号を実装基板上の信号配線を介
して引き出し、その終端に検査端子を設けることにより
、駆動用ＩＣ実装後の検査において不良箇所の同定が可
能となシ、効率的なりベアの実施によって大幅なロスコ
スト削減を図ることができる。Effects of the Invention As described above, according to the present invention, carry signals are drawn out from cascade-connected drive ICs via signal wiring on the mounting board, and a test terminal is provided at the end of the carry signal, so that the carry signal can be detected after the drive IC is mounted. It is possible to identify defective locations during inspection, and by conducting inspections efficiently, it is possible to significantly reduce loss costs.
第１図は本発明の実施例における液晶表示装置の画像表
示部及び周辺駆動用ＩＣ実装部を示した模式図である。
１・・・・・・ガラス基板、２・・・・・・スイッチン
グ素子と走査配線及び信号配線をマトリクス状に配列さ
せた画像表示部、３・・・・・・ＩＣ出力信号用実装端
子群、４・・・・・・ＩＣ入力信号用実装端子群、６・
・・・・・ＩＣ入力信号供給配線、６．７・・・・・・
Ｘ方向駆動用ｒｃ、８．９・・・・・・Ｙ方向駆動用工
Ｃ１１０・・・・・・カスケード接続配線、１１〜１４
・・・・・・キャリー信号検査端子、１６・・・・・・
外部信号入力端子。FIG. 1 is a schematic diagram showing an image display section and a peripheral driving IC mounting section of a liquid crystal display device according to an embodiment of the present invention. 1... Glass substrate, 2... Image display section in which switching elements, scanning wiring, and signal wiring are arranged in a matrix, 3... Mounting terminal group for IC output signals , 4... IC input signal mounting terminal group, 6.
...IC input signal supply wiring, 6.7...
rc for X-direction drive, 8.9...Work for Y-direction drive C110...Cascade connection wiring, 11-14
...Carry signal test terminal, 16...
External signal input terminal.
Claims (1)
ャリー信号をＩＣ入力信号供給配線を介して前記ＩＣ実
装領域外部に引出し、その終端に検査用端子を配したこ
とを特徴とする液晶表示装置。A liquid crystal display device characterized in that a carry signal from a cascade-connected switching element driving IC is led out to the outside of the IC mounting area via an IC input signal supply wiring, and a test terminal is arranged at the end of the carry signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25323290A JPH0640248B2 (en) | 1990-09-21 | 1990-09-21 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25323290A JPH0640248B2 (en) | 1990-09-21 | 1990-09-21 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04131892A true JPH04131892A (en) | 1992-05-06 |
| JPH0640248B2 JPH0640248B2 (en) | 1994-05-25 |
Family
ID=17248409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25323290A Expired - Lifetime JPH0640248B2 (en) | 1990-09-21 | 1990-09-21 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0640248B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002189229A (en) * | 2000-09-21 | 2002-07-05 | Citizen Watch Co Ltd | Image device |
| KR100480860B1 (en) * | 1997-03-28 | 2005-08-05 | 삼성전자주식회사 | LCD Display |
-
1990
- 1990-09-21 JP JP25323290A patent/JPH0640248B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100480860B1 (en) * | 1997-03-28 | 2005-08-05 | 삼성전자주식회사 | LCD Display |
| JP2002189229A (en) * | 2000-09-21 | 2002-07-05 | Citizen Watch Co Ltd | Image device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0640248B2 (en) | 1994-05-25 |
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