JP3645667B2

JP3645667B2 - Liquid crystal display

Info

Publication number: JP3645667B2
Application number: JP23270996A
Authority: JP
Inventors: 隆利山口
Original assignee: 株式会社アドバンスト・ディスプレイ
Priority date: 1996-09-03
Filing date: 1996-09-03
Publication date: 2005-05-11
Anticipated expiration: 2016-09-03
Also published as: JPH1078761A

Description

【０００１】
【発明の属する技術分野】
この発明は、液晶表示装置、特にその信号入力端子の配置および周辺仕様に関するものである。
【０００２】
【従来の技術】
マルチメディア社会の到来によりノート型パーソナルコンピュータ等が普及し、それに搭載される半導体や液晶市場は高成長を続けている。中でも、薄型、軽量、低消費電力の利点を持つａ−Ｓｉ型薄膜トランジスタを用いた液晶表示装置（ＴＦＴ−ＬＣＤ）は、カラーＣＲＴに迫る表示性能から、液晶ディスプレイの中で主流となっている。市場の大容量表示への要求に対応して、ＴＦＴ−ＬＣＤは１１. ３型クラスから１２. １型クラスの製品が開発されている。ノート型パーソナルコンピュータに用いられるＴＦＴ−ＬＣＤではＡ４サイズが要求されており、Ａ４サイズで１２. １型クラスの製品を開発する必要がある。そのためには、限られた面積で画素面積を増やすことが必要であり、入力端子等の周辺部分の面積をできる限り縮小し、周辺端子が占める額縁部分の面積を狭くする必要がある。しかし、その一方で画面の大型化とともに高精細化も必要とされ、画素数および端子数が増加するために、その占める面積も大きくなる。
【０００３】
図４は、従来の液晶表示装置のマトリクス基板等価回路図である。図において、１は走査線であるゲート配線、２は信号線であるソース配線、３はスイッチング素子である薄膜トランジスタ（以下ＴＦＴと称す）、４、５は画素部に外部信号を入力する端子部であり、それぞれ走査線用入力パッド、信号線用入力パッドである。マトリクス基板内では、複数本の走査線であるゲート配線１に直交して複数本の信号線であるソース配線２が配置されており、その交点位置にＴＦＴ３が設けられている。ゲート配線１およびソース配線２は、それぞれ独立に引き出し線が設けられており、その引き出し線の終端部に走査線用入力パッド４および信号線用入力パッド５が設けられている。
また、図５−ａは、従来の液晶表示装置に用いられる駆動ＩＣが装着されたフィルムを示す平面図、ｂはフィルムに装着された駆動ＩＣが実装されたＴＦＴアレイ基板を示す断面図である。図において６はＴＦＴアレイが形成されたガラス基板、１４はフィルム状半導体搭載装置（以下フィルムと略す）、１５はゲート配線用駆動ＩＣ、１７はフィルム上の引き回し配線を示す。図に示すように、従来の液晶表示装置では、スイッチング素子であるＴＦＴ３を駆動させるために、ゲート配線用駆動ＩＣ１５を装着したフィルム１４を用いてアレイ基板上の周辺領域の一辺に設けられた走査線用入力パッド４に貼り付けていた。また、ソース配線用駆動ＩＣも、ゲート配線用駆動ＩＣ１５と同様に、フィルム１４に装着され、アレイ基板上の周辺領域の他の一辺に設けられた信号線用入力パッド５に貼り付けていた。
【０００４】
【発明が解決しようとする課題】
以上のように、従来の液晶表示装置では、高精細化に伴う端子数の増加に対応し、且つ表示部分の大面積化を実現するために周辺領域すなわち端子部分の面積を縮小することが課題とされている。しかし、従来のようにゲート配線１とソース配線２が直交する構成では、走査線用入力パッド４および信号線用入力パッド５を液晶パネルの２辺に設ける必要があり、駆動ＩＣを装着する外付けフィルム１４もまた液晶パネルの２辺にわたって実装されるため、周辺領域の面積縮小が困難であった。ａ−Ｓｉ型に代わるＴＦＴ−ＬＣＤとして開発が進められているｐ−Ｓｉ型を使用したＴＦＴアレイプロセスでは、トランジスタの移動度がａ−Ｓｉ型アレイプロセスよりも２〜３桁大きいので、スイッチング素子を駆動させる回路をＴＦＴアレイと同一基板上の周辺部に設けることが可能であるが、プロセスコスト、歩留まりの問題があり、大型のＴＦＴーＬＣＤでは実現されていない。
【０００５】
本発明は、上記のような問題点を解消するためになされたもので、表示面積を確保しながら周辺領域すなわち端子部分の面積を縮小し、高精細化、大面積化に伴う端子数の増加に対応可能な液晶表示装置を提供することを目的とする。
【０００６】
【課題を解決するための手段】
この発明に係わる液晶表示装置は、透明絶縁性基板上にゲート配線とソース配線をそれぞれ複数本交差させ、その各交点に設けられた薄膜トランジスタに接続された透明電極によって画像表示部を構成する画素部と、画素部に外部信号を入力する端子部とを有するＴＦＴアレイ基板と、透明電極およびカラーフィルタ等を有し、ＴＦＴアレイ基板との間に液晶を挟持する対向電極基板と、フィルム状半導体搭載装置に装着され、ＴＦＴアレイ基板の端子部に接続されるゲート配線用駆動ＩＣおよびソース配線用駆動ＩＣを備えた液晶表示装置であって、ソース配線は、ゲート配線との交点でソース配線用引き込み配線に接続され、この引き込み配線は、ゲート配線の上部に絶縁膜を介してゲート配線と平行に重ねて配置されており、引き込み配線の終端部と接続されるソース配線用端子を、ゲート配線の終端部と接続されるゲート配線用端子と同一方向にそれぞれ交互に並置したものである。
また、ゲート配線用駆動ＩＣおよびソース配線用駆動ＩＣを、フィルム状半導体搭載装置の両面に装着したものである。
【０００７】
また、透明絶縁性基板上にゲート配線とソース配線をそれぞれ複数本差させ、その各交点に設けられた薄膜トランジスタに接続された透明電極によって画像表示部を構成する画素部と、画素部に外部信号を入力する端子部とを有するＴＦＴアレイ基板と、透明電極およびカラーフィルタ等を有し、ＴＦＴアレイ基板との間に液晶を挟持する対向電極基板と、フィルム状半導体搭載装置に装着され、ＴＦＴアレイ基板の端子部に接続されるゲート配線用駆動ＩＣおよびソース配線用駆動ＩＣを備えた液晶表示装置であって、ゲート配線は、ソース配線との交点でゲート配線用引き込み配線に接続され、この引き込み配線は、ソース配線の下部に絶縁膜を介してソース配線と平行に重ねて配置されており、引き込み配線の終端部と接続されるゲート配線用端子を、ソース配線の終端部と接続されるソース配線用端子と同一方向に交互それぞれに並置したものである。
さらに、ゲート配線用駆動ＩＣおよびソース配線用駆動ＩＣを、フィルム状半導体搭載装置の両面に装着したものである。
【０００８】
また、透明絶縁性基板上にゲート配線とソース配線をそれぞれ複数本交差させ、その各交点に設けられた薄膜トランジスタに接続された透明電極によって画像表示部を構成する画素部と、画素部に外部信号を入力する端子部とを有するＴＦＴアレイ基板、透明電極およびカラーフィルタ等を有し、ＴＦＴアレイ基板との間に液晶を挟持する対向電極基板、ＴＦＴアレイ基板の端子部に接続されるゲート配線用駆動ＩＣおよびソース配線用駆動ＩＣを備えた液晶表示装置であって、ソース配線は、ゲート配線との交点でソース配線用引き込み配線に接続され、この引き込み配線は、ゲート配線の上部に絶縁膜を介してゲート配線と平行に重ねて配置されており、引き込み配線の終端部と接続されるソース配線用端子を、ゲート配線の終端部と接続されるゲート配線用端子と同一方向にそれぞれ交互に並置したものである。
また、透明絶縁性基板上にゲート配線とソース配線をそれぞれ複数本交差させ、その各交点に設けられた薄膜トランジスタに接続された透明電極によって画像表示部を構成する画素部と、画素部に外部信号を入力する端子部とを有するＴＦＴアレイ基板、透明電極およびカラーフィルタ等を有し、ＴＦＴアレイ基板との間に液晶を挟持する対向電極基板、ＴＦＴアレイ基板の端子部に接続されるゲート配線用駆動ＩＣおよびソース配線用駆動ＩＣを備えた液晶表示装置であって、ゲート配線は、ソース配線との交点でゲート配線用引き込み配線に接続され、この引き込み配線は、ソース配線の下部に絶縁膜を介してソース配線と平行に重ねて配置されており、引き込み配線の終端部と接続されるゲート配線用端子を、ソース配線の終端部と接続されるソース配線用端子と同一方向にそれぞれ交互に並置したものである。
【０００９】
【発明の実施の形態】
実施の形態１．
以下に、本発明の実施の形態１である液晶表示装置を図について説明する。図１は、本発明の実施の形態１である液晶表示装置のマトリクス基板等価回路図である。図において、１ａ、１ｂ、１ｃ、１ｄは走査線であるゲート配線、２ａ、２ｂ、２ｃ、２ｄは信号線であるソース配線、２２ａ、２２ｂ、２２ｃ、２２ｄはソース配線用引き込み配線、３はスイッチング素子である薄膜トランジスタ（以下ＴＦＴと称す）、４、５は画素部に外部信号を入力する端子部であり、それぞれ走査線用入力パッド、信号線用入力パッドである。また、図中Ａ、Ｂ、Ｃ、Ｄはゲート配線１ａ、１ｂ、１ｃ、１ｄとソース配線２ａ、２ｂ、２ｃ、２ｄの各交点をそれぞれ示す。マトリクス基板内では、複数本の走査線であるゲート配線１ａ、１ｂ、１ｃ、１ｄに直交して複数本の信号線であるソース配線２ａ、２ｂ、２ｃ、２ｄが配置され、その交点位置にスイッチング素子であるＴＦＴ３が設けられている。
【００１０】
図２は、スイッチング素子であるＴＦＴ３の断面構造を示した図である。図において、６はガラス基板、７はゲート電極、８はゲート絶縁膜、９はａ−Ｓｉ膜、１０はｎ型ａ−Ｓｉ膜、１１はソース電極、１２はドレイン電極、１３は保護膜をそれぞれ示す。ＴＦＴ３の製法は、まずガラス基板６上にＣｒ等の第１層の導電層であるゲート電極７を成膜する。次に、ゲート絶縁膜８、ａ−Ｓｉ膜９を堆積、エッチングしてＡｌ等の第２の導電層であるソース電極１１およびドレイン電極１２を配置する。最後に保護絶縁膜１３を堆積してＴＦＴが完成する。
【００１１】
図３−ａは、本実施の形態による液晶表示装置に用いられる駆動ＩＣが装着されたフィルムを示す平面図、図３−ｂはフィルムに装着された駆動ＩＣが実装されたＴＦＴアレイ基板を示す断面図である。図において、１４はフィルム状半導体搭載装置（以下、フィルムと略す）、１５はゲート配線用駆動ＩＣ、１６はソース配線用駆動ＩＣ、１７はフィルム上の引き回し配線を示す。フィルム１４は、表面にゲート配線、裏面にソース配線の引き回し配線１７が設けられ、ゲート配線用駆動ＩＣ１５を表面に、ソース配線用駆動ＩＣ１６を裏面に装着する。なお、表面と裏面に装着する駆動ＩＣは、上記の逆の組み合わせでも良い。このように、フィルム１４の両面に駆動ＩＣを装着することにより、外付けのフィルム数を減らすことが可能となる。
【００１２】
本実施の形態による液晶表示装置では、スイッチング素子であるＴＦＴ３のソース電極１１は、それぞれソース配線と連結しており、ソース配線２ａは、ゲート配線１ａとの交点Ａで、ソース配線用引き込み配線２２ａに接続される。ソース配線用引き込み配線２２ａは、ゲート配線１ａの上部に絶縁膜を介して平行に配置される。順次、同様にソース配線２ｂは、ゲート配線１ｂとの交点Ｂで、ソース配線用引き込み配線２２ｂに接続され、ソース配線用引き込み配線２２ｂは、ゲート配線１ｂの上部に絶縁膜を介して平行に配置される。ゲート配線１ａ、１ｂ、１ｃ、１ｄおよびソース配線用引き込み配線２２ａ、２２ｂ、２２ｃ、２２ｄは、画素外部で同一方向に、それぞれ交互に並置された走査線用入力パッド４および信号線用入力パッド５と接続される。以上のように、本実施の形態によれば、ゲート信号およびソース信号は画素部の一辺に配置された走査線用入力パッド４および信号線用入力パッド５から入力されるため、それらが画素部の２辺を占有していた従来の液晶表示装置に比べ、周辺領域の面積の縮小化が図られる。
【００１３】
なお、本実施の形態では、ソース配線用引き込み配線をゲート配線の上部に絶縁膜を介して平行に配置したが、ソース配線用引き込み配線の代わりに、ゲート配線用引き込み配線をソース配線に平行に配置しても良く、同様の効果が得られる。その場合のゲート配線用引き込み配線は、ソース配線の下部に絶縁膜を介して配置すればよい。
【００１４】
【発明の効果】
以上のように、この発明によれば、ソース配線の引き込み配線をゲート配線と平行に配置し、ソース配線用端子をゲート配線用端子と同一方向に並置したので、表示面積を確保しながら周辺領域すなわち端子部分の面積を縮小することができ、高精細化、大面積化に伴う端子数の増加に対応可能な液晶表示装置が得られる効果がある。
【００１５】
また、ソース配線の引き込み配線は、ゲート配線の上部に絶縁膜を介して配置されているので、開口率を低下させることなく、良好な表示特性の液晶表示装置が得られる。
【００１６】
さらに、ゲート配線用駆動ＩＣおよびソース配線用駆動ＩＣを、フィルム状半導体搭載装置の両面に装着するようにしたので、外付けのフィルム数を減らすことができ、部品点数の減少により周辺領域の面積を縮小することが可能である。
【図面の簡単な説明】
【図１】この発明の実施の形態１である液晶表示装置のマトリクス基板等価回路図である。
【図２】スイッチング素子であるＴＦＴの構造を示す断面図である。
【図３】ａは、この発明の実施の形態１である液晶表示装置に用いられる駆動ＩＣが装着されたフィルムを示す平面図、ｂはフィルムに装着された駆動ＩＣが実装されたＴＦＴアレイ基板を示す断面図である。
【図４】従来の液晶表示装置のマトリクス基板等価回路図である。
【図５】ａは、従来の液晶表示装置に用いられる駆動ＩＣが装着されたフィルムを示す平面図、ｂはフィルムに装着された駆動ＩＣが実装されたＴＦＴアレイ基板を示す断面図である。
【符号の説明】
１、１ａ、１ｂ、１ｃ、１ｄゲート配線、
２、２ａ、２ｂ、２ｃ、２ｄソース配線、
２２ａ、２２ｂ、２２ｃ、２２ｄソース配線用引き込み配線、
３薄膜トランジスタ（ＴＦＴ）、４走査線用入力パッド、
５信号線用入力パッド、６ガラス基板、７ゲート電極、
８ゲート絶縁膜、９ａ−Ｓｉ膜、１０ｎ型ａ−Ｓｉ膜、
１１ソース電極、１２ドレイン電極、１３保護膜、
１４フィルム状半導体搭載装置、１５ゲート配線用駆動ＩＣ、
１６ソース配線用駆動ＩＣ、１７フィルム上の引き回し配線。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid crystal display device, and more particularly to the arrangement of its signal input terminals and peripheral specifications.
[0002]
[Prior art]
With the advent of the multimedia society, notebook personal computers and the like have become widespread, and the semiconductor and liquid crystal markets mounted on them continue to grow at a high rate. Among them, a liquid crystal display device (TFT-LCD) using an a-Si thin film transistor having advantages of thinness, light weight, and low power consumption has become mainstream among liquid crystal displays because of display performance approaching that of a color CRT. In response to the demand for large-capacity display in the market, TFT-LCD products from 11.3 type class to 12.1 type class have been developed. The TFT-LCD used in a notebook personal computer is required to have an A4 size, and it is necessary to develop a 12.1 type product with the A4 size. For this purpose, it is necessary to increase the pixel area with a limited area, and it is necessary to reduce the area of the peripheral portion such as the input terminal as much as possible and to reduce the area of the frame portion occupied by the peripheral terminal. However, on the other hand, it is necessary to increase the definition as well as the size of the screen. Since the number of pixels and the number of terminals increase, the area occupied by the screen also increases.
[0003]
FIG. 4 is an equivalent circuit diagram of a matrix substrate of a conventional liquid crystal display device. In the figure, 1 is a gate wiring as a scanning line, 2 is a source wiring as a signal line, 3 is a thin film transistor (hereinafter referred to as TFT) as a switching element, and 4 and 5 are terminal portions for inputting external signals to the pixel portion. There are a scanning line input pad and a signal line input pad, respectively. In the matrix substrate, a plurality of source lines 2 as signal lines are arranged orthogonal to a plurality of gate lines 1 as scanning lines, and a TFT 3 is provided at the intersection. The gate wiring 1 and the source wiring 2 are each provided with a lead line independently, and a scanning line input pad 4 and a signal line input pad 5 are provided at the end of the lead line.
5A is a plan view showing a film on which a driving IC used in a conventional liquid crystal display device is mounted, and FIG. 5B is a cross-sectional view showing a TFT array substrate on which the driving IC mounted on the film is mounted. . In the figure, 6 is a glass substrate on which a TFT array is formed, 14 is a film-like semiconductor mounting device (hereinafter abbreviated as film), 15 is a gate wiring driving IC, and 17 is a routing wiring on the film. As shown in the figure, in the conventional liquid crystal display device, in order to drive the TFT 3 which is a switching element, a scan provided on one side of the peripheral region on the array substrate using a film 14 equipped with a gate wiring driving IC 15 is used. It was pasted on the line input pad 4. Similarly to the gate wiring drive IC 15, the source wiring drive IC is also attached to the signal line input pad 5 mounted on the film 14 and provided on the other side of the peripheral region on the array substrate.
[0004]
[Problems to be solved by the invention]
As described above, in the conventional liquid crystal display device, it is necessary to reduce the peripheral area, that is, the area of the terminal portion in order to cope with the increase in the number of terminals accompanying the increase in definition and realize an increase in the area of the display portion. It is said that. However, in the conventional configuration in which the gate wiring 1 and the source wiring 2 are orthogonal to each other, it is necessary to provide the scanning line input pad 4 and the signal line input pad 5 on the two sides of the liquid crystal panel. Since the attachment film 14 is also mounted over two sides of the liquid crystal panel, it is difficult to reduce the area of the peripheral region. In the TFT array process using the p-Si type, which is being developed as a TFT-LCD replacing the a-Si type, the mobility of the transistor is 2 to 3 orders of magnitude higher than that of the a-Si type array process. Can be provided in the peripheral portion on the same substrate as the TFT array, but there are problems of process cost and yield, which are not realized in a large TFT-LCD.
[0005]
The present invention has been made to solve the above-described problems, and while reducing the area of the peripheral region, that is, the terminal portion while securing the display area, the number of terminals increases as the definition and the area increase. An object of the present invention is to provide a liquid crystal display device that can cope with the above.
[0006]
[Means for Solving the Problems]
In the liquid crystal display device according to the present invention, a pixel portion that constitutes an image display portion by a transparent electrode connected to a thin film transistor provided at each intersection of a plurality of gate wirings and source wirings on a transparent insulating substrate. And a TFT array substrate having a terminal portion for inputting an external signal to the pixel portion, a counter electrode substrate having a transparent electrode and a color filter and sandwiching liquid crystal between the TFT array substrate, and a film-like semiconductor mounted A liquid crystal display device having a gate wiring driver IC and a source wiring driver IC mounted on the device and connected to the terminal portion of the TFT array substrate, wherein the source wiring is pulled in at the intersection with the gate wiring. is connected to the wiring, the lead-wire is disposed to overlap in parallel with a gate wiring on the gate wiring through the insulating film, pull The source wiring terminal connected to the terminal end of the line, in the same direction as the gate wiring terminal connected to the terminal end of the gate line is obtained by juxtaposed alternately respectively.
Further, the gate wiring driving IC and the source wiring driving IC are mounted on both surfaces of the film-like semiconductor mounting device.
[0007]
In addition, a plurality of gate wirings and source wirings are respectively inserted on a transparent insulating substrate, and a pixel portion constituting an image display portion by a transparent electrode connected to a thin film transistor provided at each intersection, and an external signal is supplied to the pixel portion. A TFT array substrate having a terminal portion for inputting a TFT, a counter electrode substrate having a transparent electrode, a color filter, etc., and sandwiching liquid crystal between the TFT array substrate, a film-like semiconductor mounting device, and a TFT array A liquid crystal display device provided with a gate wiring driver IC and a source wiring driver IC connected to a terminal portion of a substrate, wherein the gate wiring is connected to the gate wiring lead-in line at the intersection with the source wiring. gate wiring to be connected are arranged to overlap in parallel with the source lines through the lower insulating layer of the source wiring, and the terminal end of the pull wire The wiring terminals, is obtained by juxtaposing to each alternately in the same direction as for a source wiring terminal connected to the terminal end portion of the source wiring.
Further, the gate wiring driving IC and the source wiring driving IC are mounted on both surfaces of the film-like semiconductor mounting device.
[0008]
In addition, a plurality of gate wirings and source wirings cross each other on a transparent insulating substrate, and a pixel portion that constitutes an image display portion by a transparent electrode connected to a thin film transistor provided at each intersection, and an external signal is supplied to the pixel portion. A TFT array substrate having a terminal portion for inputting a light source, a transparent electrode, a color filter, etc., a counter electrode substrate sandwiching liquid crystal with the TFT array substrate, and a gate wiring connected to the terminal portion of the TFT array substrate A liquid crystal display device having a drive IC and a source wiring drive IC, wherein the source wiring is connected to a source wiring lead-in line at an intersection with the gate wiring, and the lead-in wiring has an insulating film on the gate wiring. through it is arranged to overlap in parallel to the gate wiring, the lead-wiring source line terminal connected to the terminal end of the end portion of the gate wiring contact In the same direction as the gate wiring terminal that is one in which juxtaposed alternately respectively.
In addition, a plurality of gate wirings and source wirings cross each other on a transparent insulating substrate, and a pixel portion that constitutes an image display portion by a transparent electrode connected to a thin film transistor provided at each intersection, and an external signal is supplied to the pixel portion. A TFT array substrate having a terminal portion for inputting a light source, a transparent electrode, a color filter, etc., a counter electrode substrate sandwiching liquid crystal with the TFT array substrate, and a gate wiring connected to the terminal portion of the TFT array substrate A liquid crystal display device having a driving IC and a source wiring driving IC, wherein a gate wiring is connected to a gate wiring lead-in line at an intersection with the source wiring, and the lead-in wiring has an insulating film under the source wiring. through it is arranged to overlap in parallel with the source wiring, a gate wiring terminal connected to the terminal end of the pull wire, contact with the end portion of the source wiring In the same direction as for the source wiring terminal that is one in which juxtaposed alternately respectively.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
The liquid crystal display device according to the first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a matrix substrate equivalent circuit diagram of the liquid crystal display device according to the first embodiment of the present invention. In the figure, reference numerals 1a, 1b, 1c and 1d are gate wirings as scanning lines, 2a, 2b, 2c and 2d are source wirings as signal lines, 22a, 22b, 22c and 22d are lead wirings for source wiring, and 3 is switching. Thin film transistors (hereinafter referred to as TFTs), 4 and 5, which are elements, are terminal portions for inputting external signals to the pixel portion, and are a scanning line input pad and a signal line input pad, respectively. In the figure, A, B, C, and D indicate intersections of the gate lines 1a, 1b, 1c, and 1d and the source lines 2a, 2b, 2c, and 2d, respectively. In the matrix substrate, a plurality of signal lines, ie, source lines 2a, 2b, 2c, and 2d, are arranged orthogonally to a plurality of scanning lines that are gate lines 1a, 1b, 1c, and 1d, and switching is performed at the intersections. A TFT 3 as an element is provided.
[0010]
FIG. 2 is a diagram showing a cross-sectional structure of the TFT 3 that is a switching element. In the figure, 6 is a glass substrate, 7 is a gate electrode, 8 is a gate insulating film, 9 is an a-Si film, 10 is an n-type a-Si film, 11 is a source electrode, 12 is a drain electrode, and 13 is a protective film. Each is shown. In the manufacturing method of the TFT 3, first, a gate electrode 7 which is a first conductive layer such as Cr is formed on a glass substrate 6. Next, the gate insulating film 8 and the a-Si film 9 are deposited and etched to dispose the source electrode 11 and the drain electrode 12 which are second conductive layers such as Al. Finally, a protective insulating film 13 is deposited to complete the TFT.
[0011]
3A is a plan view showing a film on which a driving IC used in the liquid crystal display device according to the present embodiment is mounted, and FIG. 3-B shows a TFT array substrate on which the driving IC mounted on the film is mounted. It is sectional drawing. In the figure, 14 is a film-like semiconductor mounting device (hereinafter abbreviated as film), 15 is a gate wiring driving IC, 16 is a source wiring driving IC, and 17 is a routing wiring on the film. The film 14 has gate wiring on the front surface and source wiring routing wiring 17 on the back surface, and the gate wiring driving IC 15 is mounted on the front surface and the source wiring driving IC 16 is mounted on the back surface. Note that the driving ICs mounted on the front surface and the back surface may be the reverse combination of the above. In this way, by mounting the drive ICs on both sides of the film 14, the number of external films can be reduced.
[0012]
In the liquid crystal display device according to the present embodiment, the source electrode 11 of the TFT 3 serving as a switching element is connected to the source wiring, and the source wiring 2a is the intersection A with the gate wiring 1a at the source wiring lead-in wiring 22a. Connected to. The source wiring lead-in wiring 22a is arranged in parallel above the gate wiring 1a via an insulating film. Similarly, the source line 2b is connected to the source line lead-in line 22b at the intersection B with the gate line 1b, and the source line lead-in line 22b is arranged in parallel above the gate line 1b via an insulating film. Is done. The gate lines 1a, 1b, 1c, and 1d and the source line lead-in lines 22a, 22b, 22c, and 22d are alternately arranged in the same direction outside the pixel in the scanning line input pad 4 and the signal line input pad 5 respectively. Connected. As described above, according to the present embodiment, since the gate signal and the source signal are input from the scanning line input pad 4 and the signal line input pad 5 arranged on one side of the pixel unit, they are input to the pixel unit. Compared to the conventional liquid crystal display device that occupies these two sides, the area of the peripheral region can be reduced.
[0013]
In this embodiment, the source wiring lead-in wiring is arranged in parallel above the gate wiring through the insulating film, but the gate wiring lead-in wiring is arranged in parallel to the source wiring instead of the source wiring lead-in wiring. The same effect can be obtained. In that case, the lead-in wiring for the gate wiring may be disposed below the source wiring with an insulating film interposed.
[0014]
【The invention's effect】
As described above, according to the present invention, the lead-in wiring for the source wiring is arranged in parallel with the gate wiring, and the source wiring terminals are juxtaposed in the same direction as the gate wiring terminals. In other words, the area of the terminal portion can be reduced, and there is an effect that a liquid crystal display device that can cope with an increase in the number of terminals accompanying high definition and large area can be obtained.
[0015]
In addition, since the lead-in wiring for the source wiring is arranged above the gate wiring through an insulating film, a liquid crystal display device with good display characteristics can be obtained without reducing the aperture ratio.
[0016]
Furthermore, the gate wiring driver IC and the source wiring driver IC are mounted on both sides of the film-like semiconductor mounting device, so the number of external films can be reduced, and the area of the peripheral region can be reduced by reducing the number of parts. Can be reduced.
[Brief description of the drawings]
1 is a matrix substrate equivalent circuit diagram of a liquid crystal display device according to Embodiment 1 of the present invention;
FIG. 2 is a cross-sectional view showing a structure of a TFT as a switching element.
3A is a plan view showing a film on which a driving IC used in the liquid crystal display device according to Embodiment 1 of the present invention is mounted, and FIG. 3B is a TFT array substrate on which the driving IC mounted on the film is mounted. FIG.
FIG. 4 is an equivalent circuit diagram of a matrix substrate of a conventional liquid crystal display device.
5A is a plan view showing a film on which a driving IC used in a conventional liquid crystal display device is mounted, and FIG. 5B is a cross-sectional view showing a TFT array substrate on which the driving IC mounted on the film is mounted.
[Explanation of symbols]
1, 1a, 1b, 1c, 1d gate wiring,
2, 2a, 2b, 2c, 2d source wiring,
22a, 22b, 22c, 22d lead-in wiring for source wiring,
3 Thin film transistor (TFT), 4 Input pad for scanning line,
5 Input pad for signal line, 6 Glass substrate, 7 Gate electrode,
8 Gate insulating film, 9 a-Si film, 10 n-type a-Si film,
11 source electrode, 12 drain electrode, 13 protective film,
14 film-like semiconductor mounting device, 15 gate wiring drive IC,
16 Driving IC for source wiring, 17 Leading wiring on film.

Claims

A plurality of gate wirings and source wirings cross each other on a transparent insulating substrate, and a pixel part constituting an image display part by a transparent electrode connected to a thin film transistor provided at each intersection, and an external signal is sent to the pixel part A TFT array substrate having a terminal portion for input,
A counter electrode substrate having a transparent electrode and a color filter, and sandwiching liquid crystal between the TFT array substrate,
A liquid crystal display device equipped with a gate wiring driving IC and a source wiring driving IC mounted on a film-like semiconductor mounting device and connected to a terminal portion of the TFT array substrate,
The source wiring is connected to lead-for the source wiring lines at the intersection between the gate lines, the retraction wire is disposed to overlap in parallel with the gate wiring through the upper insulating film of the gate line, A liquid crystal display device, wherein the source wiring terminals connected to the terminal ends of the lead-in wirings are alternately arranged in the same direction as the gate wiring terminals connected to the terminal ends of the gate wiring.

2. The liquid crystal display device according to claim 1, wherein the gate wiring driving IC and the source wiring driving IC are mounted on both surfaces of the film-like semiconductor mounting device.

A plurality of gate wirings and source wirings cross each other on a transparent insulating substrate, and a pixel part constituting an image display part by a transparent electrode connected to a thin film transistor provided at each intersection, and an external signal is sent to the pixel part A TFT array substrate having a terminal portion for input,
A counter electrode substrate having a transparent electrode and a color filter, and sandwiching liquid crystal between the TFT array substrate,
A liquid crystal display device equipped with a gate wiring driving IC and a source wiring driving IC mounted on a film-like semiconductor mounting device and connected to a terminal portion of the TFT array substrate,
The gate wiring is connected to a lead wiring for gate wiring at an intersection with the source wiring, and the leading wiring is arranged in parallel with the source wiring via an insulating film below the source wiring, A liquid crystal display device, wherein the gate wiring terminals connected to the termination portion of the lead-in wiring are alternately arranged in the same direction as the source wiring terminals connected to the termination portion of the source wiring.

4. The liquid crystal display device according to claim 3, wherein the gate line driving IC and the source line driving IC are mounted on both surfaces of the film-like semiconductor mounting device.

A plurality of gate wirings and source wirings cross each other on a transparent insulating substrate, and a pixel part constituting an image display part by a transparent electrode connected to a thin film transistor provided at each intersection, and an external signal is sent to the pixel part A TFT array substrate having a terminal portion for input,
A counter electrode substrate having a transparent electrode and a color filter, and sandwiching liquid crystal between the TFT array substrate,
A liquid crystal display device including a gate wiring driving IC and a source wiring driving IC connected to a terminal portion of the TFT array substrate,
The source wiring is connected to lead-for the source wiring lines at the intersection between the gate lines, the retraction wire is disposed to overlap in parallel with the gate wiring through the upper insulating film of the gate line, A liquid crystal display device, wherein the source wiring terminals connected to the terminal ends of the lead-in wirings are alternately arranged in the same direction as the gate wiring terminals connected to the terminal ends of the gate wiring.

A plurality of gate wirings and source wirings cross each other on a transparent insulating substrate, and a pixel part constituting an image display part by a transparent electrode connected to a thin film transistor provided at each intersection, and an external signal is sent to the pixel part A TFT array substrate having a terminal portion for input,
A counter electrode substrate having a transparent electrode and a color filter, and sandwiching liquid crystal between the TFT array substrate,
A liquid crystal display device including a gate wiring driving IC and a source wiring driving IC connected to a terminal portion of the TFT array substrate,
The gate wiring is connected to a lead wiring for gate wiring at an intersection with the source wiring, and the leading wiring is arranged in parallel with the source wiring via an insulating film below the source wiring, A liquid crystal display device, wherein the gate wiring terminals connected to the termination portion of the lead-in wiring are alternately arranged in the same direction as the source wiring terminals connected to the termination portion of the source wiring.