JP3971153B2 - Liquid crystal display panel and manufacturing method thereof - Google Patents
Liquid crystal display panel and manufacturing method thereof Download PDFInfo
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- JP3971153B2 JP3971153B2 JP2001333995A JP2001333995A JP3971153B2 JP 3971153 B2 JP3971153 B2 JP 3971153B2 JP 2001333995 A JP2001333995 A JP 2001333995A JP 2001333995 A JP2001333995 A JP 2001333995A JP 3971153 B2 JP3971153 B2 JP 3971153B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、液晶表示パネルの構成に関する。
【０００２】
【従来の技術】
液晶表示パネルの内部配線は、図３に示すようにガラス基板１に複数の映像信号配線５と走査信号配線４をマトリクス状に形成され、このマトリクスの各交点に画素電極９が形成されている。液晶表示パネルには、液晶を駆動する映像信号駆動IC２、および走査信号駆動IC３が液晶表示パネルの少なくとも２辺に直接実装できるように端子が形成されている。
【０００３】
従来の液晶パネルの画像検査方法は、図３に示したように、液晶表示パネルの複数の映像信号配線５と複数の走査信号配線４の少なくとも一方に接続した共通配線７に一括点灯画検査用PAD８を形成し、この端子に検査用プローブを立てて検査用信号を供給し、液晶表示パネルの画像検査を行って簡易的に良否の判定を行っていた。そして、この一括検査用PAD８は、図３に示すように、映像信号駆動IC２、および走査信号駆動IC３を実装する少なくとも２辺のうちのいずれか一方の辺に形成していた。
【０００４】
【発明が解決しようとする課題】
しかし、近年、携帯向け液晶表示パネルの構成は、液晶表示パネルの短辺側の外形センターと表示エリアのセンターを同一にする３辺フリーの液晶表示パネルの構成が主流になてきている。この３辺フリーの液晶表示パネル構成にすると、液晶を駆動するICが１辺側にしか実装ができなくなり一括検査用PAD８を従来のような位置に形成することができないという問題を生じる。
【０００５】
点灯画像検査工程は、歩留まりなど把握するための重要な工程であり、もしこの点灯画像検査が行わなければ、その液晶表示パネルの品位も最終検査までいかないと分からないという問題が生じ、非常に生産性の効率が低下する。
【０００６】
本発明は、上記従来の問題点を解決するもので、確実に液晶パネル状態での電気検査を行えるようにし、後工程に不良を持ち込まないようにすることができる液晶表示パネルを提供する。
【０００７】
【課題を解決するための手段】
請求項１記載の液晶表示パネルは、透明基板上に複数の映像信号配線および走査信号配線がマトリクス状に形成され、前記映像信号配線または走査信号配線に接続される共通配線が形成され、前記透明基板のいずれかの１辺に沿って、前記映像信号配線に映像信号を供給する映像信号駆動ＩＣ、および、前記走査信号配線に走査信号を供給する走査信号駆動ＩＣの双方がチップオングラス工法により前記透明基板上に直接実装され、前記透明基板の短辺側の外形センターと前記透明基板に形成された表示エリアの外形センターとは略同一であり、前記１辺以外の３辺には前記映像信号駆動ＩＣおよび走査信号駆動ＩＣのいずれも実装されていない３辺フリーの液晶表示パネルであって、一括点灯画像方式により点灯画像検査を行う際に検査用端子として用いる前記共通配線に接続された一括点灯画像検査用ＰＡＤが、前記走査信号駆動ＩＣおよび映像信号駆動ＩＣの少なくともいずれか一方の出力端子と入力端子との間に形成されたことを特徴とする液晶表示パネルである。
【０００８】
また、請求項３記載の液晶表示パネルの製造方法は、透明基板上に複数の映像信号配線および走査信号配線をマトリクス状に形成する工程と、前記映像信号配線または走査信号配線に接続される共通配線を形成する工程と、前記透明基板のいずれかの１辺のみに沿って、前記映像信号配線に映像信号を供給する映像信号駆動ＩＣ、および、前記走査信号配線に走査信号を供給する走査信号駆動ＩＣの双方がチップオングラス工法により前記透明基板上に直接実装する工程と、一括点灯画像方式により、前記共通配線に接続された一括点灯画像検査ＰＡＤに検査ピンを当て画像検査を行う点灯画像検査工程と、を備える液晶表示パネルの製造方法であって、前記一括点灯画像検査用ＰＡＤを、前記走査信号駆動ＩＣおよび映像信号駆動ＩＣの少なくともいずれか一方の出力端子と入力端子との間に形成することを特徴とする液晶表示パネルの製造方法である。
【０００９】
【発明の実施の形態】
本発明の実施の形態の液晶表示パネルを図１に基づいて説明する。
【００１０】
図１および図２は、この発明の実施の形態の液晶表示パネルを示す図であり、図３に示した液晶表示パネルと同一構成部分には同一符号を付した。図２は図１のＡ部を拡大した図でる。この液晶表示パネルは図３に示した液晶表示パネルと同様、複数の走査信号配線４と複数の映像信号配線５の少なくとも一方と、液晶画面表示エリアの外側に設けられた共通配線７とを接続し、前記共通配線は一括点灯画像検査用PAD８と接続されている。
【００１１】
また、画面表示エリアの短辺側のセンターと液晶表示パネルの透明基板（本実施の形態ではガラス基板）外形の短辺側のセンター１１が略一致するよう、すなわち、画面表示エリアがガラス基板１の短辺の２等分線に対してほぼ左右対照な配置となるよう、映像信号駆動IC２と走査信号駆動IC３の両方をガラス基板１の１短辺（図１においては下側１辺）に沿って画面表示エリア外に実装する。
【００１２】
このような構成にすると、下側１辺以外は対向側のガラス基板によって挟まれた構成になり、一括点画検査用端子にピンをプロービングするには下側１辺しかなくなってしまう。また、下側１辺には、走査信号駆動IC３および映像信号駆動IC２を少なくとも２つを実装することが必要となることから、一括点灯画像検査用端子８を形成することが困難である。
【００１３】
そこで、図２に示すように、映像信号駆動IC２の出力端子１３と入力端子１２の間に一括点灯画像検査用PAD８を形成する。このような構成にすれば、確実に簡易点灯画像検査を行えるようにでき、生産性の向上及び歩留まりの向上につながる。
【００１４】
なお、本実施の形態では、映像信号駆動IC２の出力端子１３と入力端子１２の間に一括点灯画像検査用PAD８を形成したが、走査信号駆動IC３の出力端子１３と入力端子１２の間に一括点灯画像検査用PAD８を形成してもよいことは言うまでもない。また、本発明の液晶表示パネルは携帯電話、ＰＤＡなどの携帯情報端末の表示デバイスとして好適に用いられる。
【００１５】
【発明の効果】
以上のように本発明によれば、確実に簡易画像検査工程を行えるようにでき、液晶表示パネルの生産性向上および歩留まり向上につながる。
【図面の簡単な説明】
【図１】本発明の実施の形態の液晶表示パネルの構成を示す図
【図２】図１の液晶表示パネルのＡ部拡大図
【図３】従来の液晶表示パネルの概略構成図
【符号の説明】
１ ガラス基板
２ 映像信号駆動IC
３ 走査信号駆動IC
４ 走査信号配線
５ 映像信号配線
６ 表示エリア
７ 共通バス配線
８ 一括点灯画像検査用PAD
９ 画素電極
１０ TFT
１１ 画面センター
１２ 映像信号駆動ICの入力端子
１３ 映像信号駆動ICの出力端子[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a liquid crystal display panel.
[0002]
[Prior art]
As shown in FIG. 3, the internal wiring of the liquid crystal display panel has a plurality of video signal wirings 5 and scanning signal wirings 4 formed on a glass substrate 1 in a matrix, and pixel electrodes 9 are formed at each intersection of the matrix. . The liquid crystal display panel is provided with terminals so that the video signal driving IC 2 for driving the liquid crystal and the scanning signal driving IC 3 can be directly mounted on at least two sides of the liquid crystal display panel.
[0003]
As shown in FIG. 3, the conventional liquid crystal panel image inspection method uses a common wiring 7 connected to at least one of the plurality of video signal wirings 5 and the plurality of scanning signal wirings 4 of the liquid crystal display panel for collective lighting image inspection. A PAD 8 is formed, an inspection probe is set up on this terminal, an inspection signal is supplied, and an image inspection of the liquid crystal display panel is performed to easily determine whether the product is good or bad. Then, as shown in FIG. 3, the batch inspection PAD 8 is formed on one of at least two sides on which the video signal driving IC 2 and the scanning signal driving IC 3 are mounted.
[0004]
[Problems to be solved by the invention]
However, in recent years, a configuration of a liquid crystal display panel for portable use has become a mainstream configuration of a three-side free liquid crystal display panel in which the center of the outer side of the short side of the liquid crystal display panel and the center of the display area are the same. With this three-side free liquid crystal display panel configuration, there is a problem that the IC for driving the liquid crystal can only be mounted on one side and the batch inspection PAD 8 cannot be formed at the conventional position.
[0005]
The lighting image inspection process is an important process for grasping the yield, etc. If this lighting image inspection is not performed, there will be a problem that the quality of the liquid crystal display panel will not be known until the final inspection. Productivity efficiency decreases.
[0006]
The present invention solves the above-described conventional problems, and provides a liquid crystal display panel that can reliably perform an electrical inspection in the state of the liquid crystal panel and can prevent a defect from being introduced in a subsequent process.
[0007]
[Means for Solving the Problems]
The liquid crystal display panel according to claim 1, wherein a plurality of video signal wirings and scanning signal wirings are formed in a matrix on a transparent substrate, a common wiring connected to the video signal wirings or scanning signal wirings is formed, and the transparent Both a video signal driving IC that supplies a video signal to the video signal wiring and a scanning signal driving IC that supplies a scanning signal to the scanning signal wiring along one side of the substrate are formed by a chip-on-glass method. The external center on the short side of the transparent substrate mounted directly on the transparent substrate and the external center of the display area formed on the transparent substrate are substantially the same, and the video is displayed on three sides other than the one side. A three-side free liquid crystal display panel in which neither a signal driving IC nor a scanning signal driving IC is mounted, and is used for inspection when performing a lighting image inspection by a collective lighting image method. A collective lighting image inspection PAD connected to the common wiring used as a child is formed between an output terminal and an input terminal of at least one of the scanning signal driving IC and the video signal driving IC. It is a liquid crystal display panel.
[0008]
According to a third aspect of the present invention, there is provided a liquid crystal display panel manufacturing method comprising: forming a plurality of video signal wirings and scanning signal wirings in a matrix on a transparent substrate; and a common connection to the video signal wirings or scanning signal wirings. Forming a wiring, a video signal driving IC for supplying a video signal to the video signal wiring along only one side of the transparent substrate, and a scanning signal for supplying a scanning signal to the scanning signal wiring A process in which both of the driving ICs are directly mounted on the transparent substrate by a chip-on-glass method, and a lighting image for performing an image inspection by applying an inspection pin to the batch lighting image inspection PAD connected to the common wiring by a batch lighting image method. A liquid crystal display panel manufacturing method comprising: an inspection step, wherein the batch lighting image inspection PAD is less than the scanning signal driving IC and the video signal driving IC. Ku even is a manufacturing method of a liquid crystal display panel and forming between the input terminal and one output terminal.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A liquid crystal display panel according to an embodiment of the present invention will be described with reference to FIG.
[0010]
1 and 2 are diagrams showing a liquid crystal display panel according to an embodiment of the present invention. The same components as those of the liquid crystal display panel shown in FIG. FIG. 2 is an enlarged view of part A in FIG. As in the liquid crystal display panel shown in FIG. 3, this liquid crystal display panel connects at least one of the plurality of scanning signal wirings 4 and the plurality of video signal wirings 5 and a common wiring 7 provided outside the liquid crystal screen display area. The common wiring is connected to the batch lighting image inspection PAD 8.
[0011]
Further, the center on the short side of the screen display area and the center 11 on the short side of the outer shape of the transparent substrate (in this embodiment, the glass substrate) of the liquid crystal display panel substantially coincide, that is, the screen display area is the glass substrate 1. Both the video signal driving IC 2 and the scanning signal driving IC 3 are placed on one short side (the lower one side in FIG. 1) of the glass substrate 1 so that the left and right bisectors are substantially symmetrical. Along the screen display area.
[0012]
With such a configuration, a portion other than the lower one side is sandwiched between the opposing glass substrates, and only one lower side is left for probing the pins to the batch point inspection terminal. Further, since it is necessary to mount at least two of the scanning signal driving IC 3 and the video signal driving IC 2 on the lower side, it is difficult to form the collective lighting image inspection terminal 8.
[0013]
Therefore, as shown in FIG. 2, a collective lighting image inspection PAD 8 is formed between the output terminal 13 and the input terminal 12 of the video signal driving IC 2. With such a configuration, it is possible to surely perform a simple lighting image inspection, which leads to an improvement in productivity and an improvement in yield.
[0014]
In the present embodiment, the collective lighting image inspection PAD 8 is formed between the output terminal 13 and the input terminal 12 of the video signal driving IC 2, but the collective operation is performed between the output terminal 13 and the input terminal 12 of the scanning signal driving IC 3. It goes without saying that the lighting image inspection PAD 8 may be formed. The liquid crystal display panel of the present invention is suitably used as a display device for portable information terminals such as mobile phones and PDAs.
[0015]
【The invention's effect】
As described above, according to the present invention, the simple image inspection process can be surely performed, which leads to improvement in productivity and yield of the liquid crystal display panel.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a liquid crystal display panel according to an embodiment of the present invention. FIG. 2 is an enlarged view of a portion A of the liquid crystal display panel of FIG. Explanation】
1 Glass substrate 2 Video signal drive IC
3 Scanning signal drive IC
4 Scanning signal wiring 5 Video signal wiring 6 Display area 7 Common bus wiring 8 Collective lighting image inspection PAD
9
11 Screen Center 12 Video Signal Driver IC Input Terminal 13 Video Signal Driver IC Output Terminal
Claims (3)
前記映像信号配線または走査信号配線に接続される共通配線が形成され、
前記透明基板のいずれかの１辺に沿って、前記映像信号配線に映像信号を供給する映像信号駆動ＩＣ、および、前記走査信号配線に走査信号を供給する走査信号駆動ＩＣの双方がチップオングラス工法により前記透明基板上に直接実装され、
前記透明基板の短辺側の外形センターと前記透明基板に形成された表示エリアの外形センターとは略同一であり、前記１辺以外の３辺には前記映像信号駆動ＩＣおよび走査信号駆動ＩＣのいずれも実装されていない３辺フリーの液晶表示パネルであって、
一括点灯画像方式により点灯画像検査を行う際に検査用端子として用いる前記共通配線に接続された一括点灯画像検査用ＰＡＤが、前記走査信号駆動ＩＣおよび映像信号駆動ＩＣの少なくともいずれか一方の出力端子と入力端子との間に形成されたことを特徴とする液晶表示パネル。A plurality of video signal lines and scanning signal lines are formed in a matrix on a transparent substrate,
A common wiring connected to the video signal wiring or the scanning signal wiring is formed,
Both a video signal driving IC that supplies a video signal to the video signal wiring and a scanning signal driving IC that supplies a scanning signal to the scanning signal wiring along any one side of the transparent substrate are chip-on-glass. Mounted directly on the transparent substrate by a construction method,
The outline center on the short side of the transparent substrate and the outline center of the display area formed on the transparent substrate are substantially the same, and the video signal driving IC and the scanning signal driving IC are provided on three sides other than the one side. It is a three-side free liquid crystal display panel that is not mounted,
A batch lighting image inspection PAD connected to the common wiring used as an inspection terminal when performing a lighting image inspection by the batch lighting image method is an output terminal of at least one of the scanning signal driving IC and the video signal driving IC. A liquid crystal display panel formed between the input terminal and the input terminal.
前記映像信号配線または走査信号配線に接続される共通配線を形成する工程と、
前記透明基板のいずれかの１辺のみに沿って、前記映像信号配線に映像信号を供給する映像信号駆動ＩＣ、および、前記走査信号配線に走査信号を供給する走査信号駆動ＩＣの双方がチップオングラス工法により前記透明基板上に直接実装する工程と、
一括点灯画像方式により、前記共通配線に接続された一括点灯画像検査ＰＡＤに検査ピンを当て画像検査を行う点灯画像検査工程と、を備える液晶表示パネルの製造方法であって、
前記一括点灯画像検査用ＰＡＤを、前記走査信号駆動ＩＣおよび映像信号駆動ＩＣの少なくともいずれか一方の出力端子と入力端子との間に形成することを特徴とする液晶表示パネルの製造方法。Forming a plurality of video signal lines and scanning signal lines in a matrix on a transparent substrate;
Forming a common wiring connected to the video signal wiring or the scanning signal wiring;
Both the video signal driving IC that supplies the video signal to the video signal wiring and the scanning signal driving IC that supplies the scanning signal to the scanning signal wiring along only one side of the transparent substrate are chip-on. Mounting directly on the transparent substrate by a glass method;
A lighting image inspection step of performing an image inspection by applying an inspection pin to the collective lighting image inspection PAD connected to the common wiring by the collective lighting image method, and a manufacturing method of a liquid crystal display panel,
A method of manufacturing a liquid crystal display panel, wherein the batch lighting image inspection PAD is formed between an output terminal and an input terminal of at least one of the scanning signal driving IC and the video signal driving IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001333995A JP3971153B2 (en) | 2001-10-31 | 2001-10-31 | Liquid crystal display panel and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001333995A JP3971153B2 (en) | 2001-10-31 | 2001-10-31 | Liquid crystal display panel and manufacturing method thereof |
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| JP2003140165A JP2003140165A (en) | 2003-05-14 |
| JP3971153B2 true JP3971153B2 (en) | 2007-09-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7956976B1 (en) | 2002-09-10 | 2011-06-07 | Hitachi Displays, Ltd. | Liquid crystal display device |
| JP4006304B2 (en) | 2002-09-10 | 2007-11-14 | 株式会社 日立ディスプレイズ | Image display device |
| JP4525174B2 (en) * | 2004-05-21 | 2010-08-18 | セイコーエプソン株式会社 | Liquid crystal display |
| JP2006106132A (en) * | 2004-09-30 | 2006-04-20 | Sharp Corp | Display driving circuit and display device |
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