JPS63301924A - Active matrix substrate - Google Patents
Active matrix substrateInfo
- Publication number
- JPS63301924A JPS63301924A JP62138365A JP13836587A JPS63301924A JP S63301924 A JPS63301924 A JP S63301924A JP 62138365 A JP62138365 A JP 62138365A JP 13836587 A JP13836587 A JP 13836587A JP S63301924 A JPS63301924 A JP S63301924A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- signal line
- crystal drive
- drive electrode
- active matrix
- 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
- 239000000758 substrate Substances 0.000 title claims abstract description 17
- 239000011159 matrix material Substances 0.000 title claims abstract description 10
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 47
- 239000011521 glass Substances 0.000 claims description 2
- 230000005684 electric field Effects 0.000 abstract description 13
- 230000015556 catabolic process Effects 0.000 abstract 3
- 238000006731 degradation reaction Methods 0.000 abstract 3
- 230000000694 effects Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はアクティブマトリックス基板を用いた液晶表示
パネルに関し、アクティブマトリックス基板の構成に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display panel using an active matrix substrate, and relates to the structure of the active matrix substrate.
第２図は従来におけるアクティブマトリックス基板の構
造を示したものであり、液晶を駆動する一画素の平面図
が第２図（ａ）であり、菌内のＸ−Ｙの断面図を示した
のが第２図（ｂ）である。Figure 2 shows the structure of a conventional active matrix substrate, and Figure 2 (a) is a plan view of one pixel that drives a liquid crystal, and Figure 2 (a) shows an X-Y cross-sectional view inside a bacterium. is shown in FIG. 2(b).
１が信号線、２がタイミング線、３がＴ、Ｆ、Ｔを用い
た非線形素子、４が液晶駆動電極である。1 is a signal line, 2 is a timing line, 3 is a nonlinear element using T, F, and T, and 4 is a liquid crystal drive electrode.
又、５はＴ、Ｆ、Ｔ、３と、信号線１及び、液晶駆動電
極４とを接続する為に設けられたコンタクトホールであ
る。Further, 5 is a contact hole provided to connect T, F, T, 3 to the signal line 1 and the liquid crystal drive electrode 4.
さらに第２図（ａ）のＸ−Ｙでの単面構造を示したのが
第２図（ｂ）である。基板６の表面に信号線１、矢印０
で示すスペースを置いて、液晶駆動電極４が形成されて
いる。この様に信号線１と液晶駆動電極４は必ず間隔（
例えば５〜１０ミクロンメートル）を置いて形成される
のが特徴であった。Further, FIG. 2(b) shows the single-plane structure taken along the line X-Y in FIG. 2(a). Signal line 1, arrow 0 on the surface of board 6
A liquid crystal drive electrode 4 is formed with a space indicated by . In this way, the signal line 1 and the liquid crystal drive electrode 4 are always spaced apart (
For example, it was characterized by being formed at intervals of 5 to 10 micrometers.
しかし、前述の従来技術では液晶にかかる電界の方向が
場所に依り異なるという不具合が生じている。つまり、
第２図（ｂ） について詳述すると、この基板を用い
て液晶表示パネルを構成する場合、第２図（ｂ）の上側
に液晶が構成され、その液晶に、図中■で示される矢印
方向に電界を印加して液晶を動作させる。しかるに信号
線１と液晶駆動電極４とのスペース部分は矢印Ｏと平行
な電界が無いのみならず、信号線１と液晶駆動電極４と
の電位差に依り図中矢印０で示す方向に電界が生じる。However, the above-mentioned conventional technology has a problem in that the direction of the electric field applied to the liquid crystal varies depending on the location. In other words,
To explain in detail about FIG. 2(b), when a liquid crystal display panel is constructed using this substrate, a liquid crystal is constructed on the upper side of FIG. Apply an electric field to operate the liquid crystal. However, in the space between the signal line 1 and the liquid crystal drive electrode 4, not only is there no electric field parallel to the arrow O, but also an electric field is generated in the direction indicated by the arrow 0 in the figure due to the potential difference between the signal line 1 and the liquid crystal drive electrode 4. .
液晶表示体では、液晶の劣化防止の為交流駆動している
ので、液晶駆動電極４は正電位の時、信号線Ｉは負電位
である事がいつも生じており、つまり通常の液晶駆動電
圧の２倍の電圧がこの部分にかかる事となる。従って当
然この部分は表示に寄与しないし、さらにこの部分の電
界が強い事又、矢印Ｏで示される電界も生じる事等に依
り表示に寄与しない領域は、液晶駆動電極の内側へも及
ぶ。 この領域は平面図第２図（ａ）で見るとわかる様
に液晶駆動電極４の左・右の辺全体にわたっており、画
素面積に対する割合が大きい。特に今後液晶パネルに依
る高密度表示を目脂した場合、画素サイズが小さくなり
、従って上記表示に寄与しない部分の割合が増々増え、
表示特性上コントラストの低下をきたす。Since the liquid crystal display is driven by alternating current to prevent deterioration of the liquid crystal, when the liquid crystal drive electrode 4 is at a positive potential, the signal line I is always at a negative potential, which means that the normal liquid crystal drive voltage is Twice the voltage will be applied to this part. Naturally, therefore, this part does not contribute to display, and since the electric field in this part is strong and the electric field indicated by arrow O is also generated, the area that does not contribute to display extends to the inside of the liquid crystal drive electrode. As can be seen from the plan view of FIG. 2(a), this region extends over the entire left and right sides of the liquid crystal drive electrode 4, and has a large proportion to the pixel area. In particular, if high-density display based on liquid crystal panels is adopted in the future, the pixel size will become smaller, and the proportion of the area that does not contribute to the display will increase.
This causes a decrease in contrast due to display characteristics.
本発明のアクティブマトリックス基板は、 液晶駆動電
極を信号線と重ねて構成する事を特徴とし、表示に寄与
する領域の割合を増加し、画素サイズが低下した場合に
おいても、コントラスト等表示特性の低下を防止するも
のである。The active matrix substrate of the present invention is characterized by having liquid crystal drive electrodes overlapped with signal lines, which increases the proportion of the area contributing to display, and prevents deterioration of display characteristics such as contrast even when the pixel size decreases. This is to prevent
本発明では垂直方向の電界の掛からない領域を減少させ
、水平方向の電界を無くする事に依り、液晶表示パネル
のコントラストを増加させ、あるいはコントラストの低
下を防止する。The present invention increases the contrast of a liquid crystal display panel or prevents a decrease in contrast by reducing the area where no electric field is applied in the vertical direction and eliminating the electric field in the horizontal direction.
第１図（ａ）は本発明を実施したアクティブマトリック
ス基板の１例の平面図を示し、図中のＸ−Ｙにおける断
面構造を示したものが、 第１図（ｂ）である。各部材
は第２図と同じ番号で示しである。すなわち、１は信号
線、２はタイミング線、３は非線形素子としてのＴ、Ｆ
、Ｔ、 、４は液晶駆動電極、５はＴ、Ｆ、Ｔ、３と、
信号線１とを、及びＴ、Ｆ、Ｔ、３と液晶駆動電極４と
をそれぞれ接続するコンタクトホールである。又断面図
第１図（ｂ’）では、７は信号線１と液晶駆動電極４を
重ねる為にその間に介在させ両者が電気的にショートす
るのを防ぐ目的の絶縁膜である。FIG. 1(a) shows a plan view of an example of an active matrix substrate embodying the present invention, and FIG. 1(b) shows a cross-sectional structure taken along the line X-Y in the figure. Each member is designated by the same number as in FIG. That is, 1 is a signal line, 2 is a timing line, and 3 is T and F as nonlinear elements.
,T, ,4 is a liquid crystal drive electrode, 5 is T,F,T,3,
These are contact holes that connect the signal line 1 and T, F, T, 3 and the liquid crystal drive electrode 4, respectively. Further, in the cross-sectional view of FIG. 1(b'), 7 is an insulating film interposed between the signal line 1 and the liquid crystal drive electrode 4 so as to overlap them, and for the purpose of preventing electrical short-circuiting between the two.
この断面図かられかる様に、信号！ａｌと液晶駆動電極
４の間の電界はすべて絶縁膜７内にかかり、液晶内に生
ずる事は無い。従って、液晶内の電界はすべて基板６に
垂直であり、コントラストの低下要因は発生しない。As you can see from this cross-sectional view, there is a signal! The electric field between al and the liquid crystal drive electrode 4 is entirely applied within the insulating film 7, and is not generated within the liquid crystal. Therefore, all electric fields within the liquid crystal are perpendicular to the substrate 6, and no cause of contrast deterioration occurs.
第３図は本発明に依る他の実施例を示した平面図である
。この実施例では、信号線１の信号が入る液晶駆動電極
４と、該電極の左の液晶駆動電極８が同時に重なってい
る。つまり１つの液晶駆動電極で見れば、その左側も、
右側も信号線に重なっているので、表示に寄与しない領
域は大幅に減少する。FIG. 3 is a plan view showing another embodiment according to the present invention. In this embodiment, the liquid crystal drive electrode 4 into which the signal from the signal line 1 is input and the liquid crystal drive electrode 8 to the left of this electrode overlap at the same time. In other words, if you look at one liquid crystal drive electrode, the left side of it is also
Since the right side also overlaps with the signal line, the area that does not contribute to display is significantly reduced.
上述した本発明の実施例のように、信号線と、液晶駆動
電極は、水平方向に間隔を取る事をせずに、信号線上に
液晶駆動電極を重ねる事に依り、液晶表示に寄与する領
域を増加させ、又は画素サイズが小さくなってもコント
ラストの低下を押える事が可能である。この効果は、ア
クティブマトリックスを構成する基板をガラス等透明基
板を用い、透過形の液晶表示パネルにおいて、一層大き
い。つまり、第２図（ｂ）の信号線と液晶駆動電極の間
の液晶は水平方向の電界の為に基板に垂直方向の光を完
全に遮光もしないし、又完全透過する事も無いので、透
過形表示の場合コントラスト低下の影響が大きい。従っ
てこの領域を無くした本発明の効果は大きい。As in the above-described embodiment of the present invention, the signal line and the liquid crystal drive electrode are arranged in an area that contributes to liquid crystal display by overlapping the liquid crystal drive electrode on the signal line without leaving any space between them in the horizontal direction. Even if the pixel size is increased or the pixel size is decreased, it is possible to suppress the decrease in contrast. This effect is even greater in a transmissive liquid crystal display panel in which a transparent substrate such as glass is used as the substrate constituting the active matrix. In other words, the liquid crystal between the signal line and the liquid crystal drive electrode in FIG. 2(b) does not completely block vertical light from the substrate due to the horizontal electric field, nor does it completely transmit it. In the case of a transmissive display, the effect of contrast reduction is large. Therefore, the effect of the present invention, which eliminates this area, is significant.
第１図（ａ）は、本発明の１実施例を示す平面図。
第１図（ｂ）はその断面図、第２図（ａ）は従来例を示
す平面図、第２図（ｂ）はその断面図、第３図は、本発
明の他の実施例を示す平面図である。
１・・・信号線
２・・・タイミング線
３・・・非線形素子
４．８・・・液晶駆動電極
５・・・コンタクトホール
６・・・基板
７・・・絶縁層
以 上FIG. 1(a) is a plan view showing one embodiment of the present invention. Fig. 1(b) is a sectional view thereof, Fig. 2(a) is a plan view showing a conventional example, Fig. 2(b) is a sectional view thereof, and Fig. 3 shows another embodiment of the present invention. FIG. 1...Signal line 2...Timing line 3...Nonlinear element 4.8...Liquid crystal drive electrode 5...Contact hole 6...Substrate 7...Insulating layer and above
Claims (1)
かも互いに平行な複数のタイミング線と、該信号線と該
信号線に接続された複数の非線形素子と、該非線形素子
に接続された複数の液晶駆動電極とを有する、アクティ
ブマトリックス基板において、上記液晶駆動電極は上記
信号線と重なっている事を特徴とする、アクティブマト
リックス基板。 ２）前記信号線、前記タイミング線、前記非線形素子、
前記液晶駆動電極は、ガラス基板上に形成されている事
を特徴とする特許請求の範囲第１項記載のアクティブマ
トリックス基板。[Claims] 1) A plurality of signal lines parallel to each other, a plurality of timing lines perpendicular to the signal lines and parallel to each other, the signal lines and a plurality of nonlinear elements connected to the signal lines, An active matrix substrate having a plurality of liquid crystal drive electrodes connected to the nonlinear element, wherein the liquid crystal drive electrode overlaps the signal line. 2) the signal line, the timing line, the nonlinear element,
2. The active matrix substrate according to claim 1, wherein the liquid crystal drive electrode is formed on a glass substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62138365A JP2646557B2 (en) | 1987-06-02 | 1987-06-02 | Active matrix substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62138365A JP2646557B2 (en) | 1987-06-02 | 1987-06-02 | Active matrix substrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63301924A true JPS63301924A (en) | 1988-12-08 |
| JP2646557B2 JP2646557B2 (en) | 1997-08-27 |
Family
ID=15220227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62138365A Expired - Lifetime JP2646557B2 (en) | 1987-06-02 | 1987-06-02 | Active matrix substrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2646557B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02248927A (en) * | 1989-03-23 | 1990-10-04 | Matsushita Electron Corp | Liquid crystal display device |
| DE19521749A1 (en) * | 1994-06-15 | 1996-01-04 | Sharp Kk | LCD board with active matrix substrate |
| US5852488A (en) * | 1992-04-28 | 1998-12-22 | Semiconductor Energy Laboratory Co., Ltd. | Electro-optical device and method of driving the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5730881A (en) * | 1980-07-31 | 1982-02-19 | Suwa Seikosha Kk | Active matrix substrate |
| JPS62223727A (en) * | 1986-03-25 | 1987-10-01 | Seiko Epson Corp | Liquid crystal panel |
-
1987
- 1987-06-02 JP JP62138365A patent/JP2646557B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5730881A (en) * | 1980-07-31 | 1982-02-19 | Suwa Seikosha Kk | Active matrix substrate |
| JPS62223727A (en) * | 1986-03-25 | 1987-10-01 | Seiko Epson Corp | Liquid crystal panel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02248927A (en) * | 1989-03-23 | 1990-10-04 | Matsushita Electron Corp | Liquid crystal display device |
| US5852488A (en) * | 1992-04-28 | 1998-12-22 | Semiconductor Energy Laboratory Co., Ltd. | Electro-optical device and method of driving the same |
| DE19521749A1 (en) * | 1994-06-15 | 1996-01-04 | Sharp Kk | LCD board with active matrix substrate |
| US5659375A (en) * | 1994-06-15 | 1997-08-19 | Sharp Kabushiki Kaisha | Active matrix LCD device having two equal coupling capacitances |
| DE19521749C2 (en) * | 1994-06-15 | 1998-12-03 | Sharp Kk | LCD panel and active matrix substrate for one |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2646557B2 (en) | 1997-08-27 |
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