JPS62196626A - Color liquid crystal panel - Google Patents
Color liquid crystal panelInfo
- Publication number
- JPS62196626A JPS62196626A JP61039470A JP3947086A JPS62196626A JP S62196626 A JPS62196626 A JP S62196626A JP 61039470 A JP61039470 A JP 61039470A JP 3947086 A JP3947086 A JP 3947086A JP S62196626 A JPS62196626 A JP S62196626A
- Authority
- JP
- Japan
- Prior art keywords
- pattern
- substrate
- liquid crystal
- lead pattern
- transparent electrode
- 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.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims description 27
- 239000000758 substrate Substances 0.000 claims abstract description 48
- 230000001681 protective effect Effects 0.000 claims description 7
- 210000002858 crystal cell Anatomy 0.000 claims description 5
- 239000011521 glass Substances 0.000 abstract description 20
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052709 silver Inorganic materials 0.000 abstract description 3
- 239000004332 silver Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 230000006866 deterioration Effects 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000059 patterning Methods 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、カラー表示用の液晶パネルに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal panel for color display.
現在のカラー液晶パネルはＴＮ（ツィステッドネマチッ
ク）液晶を光量調節可能な光シヤツターとして用い、光
の３原色であるＲ（赤）、Ｇ（緑）、Ｂ（青）の微細カ
ラーフィルターを介して表示する方式が主である。Current color LCD panels use TN (twisted nematic) liquid crystal as a light shutter that can adjust the amount of light, and the three primary colors of light, R (red), G (green), and B (blue), are transmitted through fine color filters. The main method is the display method.
その具体的な構造はカラーフィルターの形成位置によっ
て現在大きく２つに分けられる。その１つはカラーフィ
ルターを液晶セルの外側に形成した方式（外在型と呼ぶ
）である。この構造はカラーフィルターと液晶層の間に
かなりの厚さく２００〜１００μｍ）の透明基板が存在
するため、カラーフィルターと液晶の化学的相互作用の
心配はほとんど無い。しかしながら、その透明基板の厚
さゆえに斜め方向からこの構造のカラー液晶パネルを見
た場合、混色を起こして本来の色と異った色の表示をす
るどい５欠点がある。も５ 一つの構造は液晶セル内に
カラーフィルターを形成する方式で、前述のものに対し
て内在型と呼ぶ。The specific structure is currently divided into two types depending on the position where the color filter is formed. One of these is a method in which a color filter is formed outside the liquid crystal cell (referred to as an external type). In this structure, since a transparent substrate with a considerable thickness (200 to 100 μm) exists between the color filter and the liquid crystal layer, there is almost no concern about chemical interaction between the color filter and the liquid crystal. However, due to the thickness of the transparent substrate, when a color liquid crystal panel having this structure is viewed from an oblique direction, color mixing occurs and a color different from the original color is displayed. 5 One structure is a method in which a color filter is formed within the liquid crystal cell, which is called an internal type in contrast to the above-mentioned structure.
内在型は透明電極に対するカラーフィルターの形成位置
により、さらに２つに分けることができる。The intrinsic type can be further divided into two types depending on the position where the color filter is formed relative to the transparent electrode.
透明電極上にカラーフィルターを形成する方式な上カラ
ーフィルタ一方式と呼ぶこととする。それに対して透明
電極より下にカラーフィルターを形成する方式を下カラ
ーフィルタ一方式と呼ぶこととする。いずれの内在型も
外在型の様な混色の問題は無く、工夫しだいでは液晶層
との化学的相互作用の問題も無くなる。上カラーフィル
タ一方式の製作工程は透明基板上に透明電極パターンを
形成し、その上にカラーフィルターを形成するのみで、
工程上量も簡単である。しかしながら、透明電極パター
ンと液晶層との間にカラーフィルターを介する構造にな
っているために電圧ドロップ。This method will be referred to as the upper color filter method, which forms a color filter on a transparent electrode. On the other hand, a method in which a color filter is formed below the transparent electrode is referred to as a lower color filter method. Both of the intrinsic types do not have the problem of color mixing like the extrinsic types, and with some ingenuity, the problem of chemical interaction with the liquid crystal layer can also be eliminated. The manufacturing process for the upper color filter type is simply to form a transparent electrode pattern on a transparent substrate, and then form a color filter on top of it.
The manufacturing process is also simple. However, the structure has a color filter between the transparent electrode pattern and the liquid crystal layer, which causes a voltage drop.
液晶の急峻性の低下を引き起こし画質が低下する。This causes a decrease in the sharpness of the liquid crystal, resulting in a decrease in image quality.
一方、下カラーフィルタ一方式は、第２図（ａ）、（ｂ
ｌに示す通りで、第２図（ａ）はカラー液晶パネルの平
面図であり、第２図（ｂ）は第２図（ａ）のＡ−Ａ線断
面図である。図に基づいて述べると、第１の基板の透明
基板である下側ガラス基板２６の一部に透明電極パター
ンの画像側画素パターン２４を形成し、第２の基板の透
明基板である上側ガラス基板２５の一部に形成したカラ
ーフィルター１２を透明保護膜１６で覆いその上に透明
電極（ＩＴＯ）パターンの走査側画素パターン２９を形
成し、上側ガラス基板２５と下側ガラス基板２６０間に
液晶層２２をシール剤１５でシーリングしている、又上
側ガラス基板２５の他部に走査側画素パターン２９に連
続して形成した走査側出力リードパターン２８と走査側
ＩＣ入力リードパターン１８とを走査側ＩＣ２１で導通
させ、下側ガラス基板２６の他部に画像側画素パターン
２４に連続して形成した画像側出力リードパターン１６
と画像側ＩＣ入力リードパターン１７とを画像側ＩＣ２
０で導通させている。この方式では上カラーフィルタ一
方式の様な画質の低下は起こらず、しかも外在型の様な
混色も起こらない。On the other hand, the lower color filter type is shown in Figs. 2(a) and (b).
2(a) is a plan view of the color liquid crystal panel, and FIG. 2(b) is a sectional view taken along the line A--A in FIG. 2(a). Based on the figure, an image side pixel pattern 24 of a transparent electrode pattern is formed on a part of a lower glass substrate 26 which is a transparent substrate of a first substrate, and an upper glass substrate which is a transparent substrate of a second substrate is formed. The color filter 12 formed on a part of the glass substrate 25 is covered with a transparent protective film 16, and a scanning side pixel pattern 29 of a transparent electrode (ITO) pattern is formed thereon, and a liquid crystal layer is formed between the upper glass substrate 25 and the lower glass substrate 260. 22 is sealed with a sealant 15, and a scanning-side output lead pattern 28 and a scanning-side IC input lead pattern 18 formed continuously with the scanning-side pixel pattern 29 on the other part of the upper glass substrate 25 are connected to the scanning-side IC 21. An image side output lead pattern 16 is formed on the other part of the lower glass substrate 26 continuously to the image side pixel pattern 24.
and the image side IC input lead pattern 17.
0 makes it conductive. This method does not cause deterioration in image quality as in the case of a single upper color filter system, and also does not cause color mixing as in the external type.
ここで問題となるのはリード部も含んだ透明電−極の抵
抗値である。一般に透明電極の抵抗値の増加は画質の低
下につながる。特に第２図に示す様に液晶パネル全体の
コンパクト化を考えて液晶パネルに直接駆動ＩＣの走査
側ＩＣと画像側ＩＣな搭載することを想定し、透明電極
に表示部電極としてだけでなくＩＣメカ部の配線の役目
を持たせた場合、抵抗値の増加は画質の低下に顕著に効
いてくる。現在量も比抵抗が低く透明電極として一般的
な透明導電膜□はＩＴＯ（Ｉｎｄｉｕｍ Ｔｉｎ ０ｘ
ｉｄｅ）膜であるが、これは通常３００℃以上の温度条
件下で形成され、比抵抗を保りている。しかるに、ＩＴ
Ｏ膜をカラーフィルター上の透明保護膜に形成する場合
は、カラーフィルターの耐熱性ゆえに約２００℃以下で
形成しなければならない。この場合、ＩＴＯ膜の比抵抗
は３００℃以上の場合と比べて３〜５倍となる。ＩＴＯ
膜の膜厚を厚くすれば抵抗値は下げられるが、後のパタ
ーニングや密着性に支障を来たす。又、ＩＴＯ膜上にメ
タル配線することも考えられるが、工程上難しく開口率
も下がることになる。さらに、カラーフィルターおよび
その上の透明保護膜の形成する段差によって、ＩＴＯ膜
の抵抗値の増加あるいは断線の恐れがある。The problem here is the resistance value of the transparent electrode including the lead portion. Generally, an increase in the resistance value of a transparent electrode leads to a decrease in image quality. In particular, as shown in Figure 2, in order to make the entire liquid crystal panel more compact, we assumed that the scanning side IC and the image side IC of the drive IC would be mounted directly on the liquid crystal panel, and the transparent electrode would be used not only as a display part electrode but also as an IC. When used as wiring for mechanical parts, an increase in resistance value significantly reduces image quality. The current transparent conductive film □, which has low specific resistance and is commonly used as a transparent electrode, is ITO (Indium Tin 0x
ide) film, which is usually formed at a temperature of 300° C. or higher and maintains specific resistance. However, IT
When forming an O film as a transparent protective film on a color filter, it must be formed at a temperature of about 200° C. or lower because of the heat resistance of the color filter. In this case, the specific resistance of the ITO film is 3 to 5 times higher than that at 300° C. or higher. ITO
If the film thickness is increased, the resistance value can be lowered, but this will cause problems in later patterning and adhesion. It is also conceivable to form metal wiring on the ITO film, but this would be difficult in terms of process and would reduce the aperture ratio. Furthermore, the difference in level formed by the color filter and the transparent protective film thereon may increase the resistance value of the ITO film or cause wire breakage.
上記問題を解決するため本発明は、透明電極パターンを
有する透明基板を第１の基板とし、カラーフィルターと
そのカラーフィルターを覆う透明保護膜と透明電極パタ
ーンとを有する透明基板を第２の基板とするカラー液晶
パネルにおいて、前記第２の基板に形成された透明電極
バター／用のリードパターンを前記第１の基板に形成し
、前記第２の基板上の透明電極パターンと各対向する前
記第１の基板上に形成したリードパターンとを液晶セル
内で導電ペーストにより導通させることを特徴としてい
る。In order to solve the above problems, the present invention uses a transparent substrate having a transparent electrode pattern as a first substrate, and uses a transparent substrate having a color filter, a transparent protective film covering the color filter, and a transparent electrode pattern as a second substrate. In the color liquid crystal panel, a lead pattern for the transparent electrode formed on the second substrate is formed on the first substrate, and a lead pattern for each of the first transparent electrodes formed on the second substrate is formed on the first substrate. The feature is that the lead pattern formed on the substrate is electrically connected to the lead pattern formed on the substrate within the liquid crystal cell using a conductive paste.
次に本発明を図面を用いて説明する。本発明の実施例で
あるカラー液晶セルの平面図およびＡ−Ａ断面図を第１
図（ａ）および（ｂ）に示す。以下に述べる各画素パタ
ーン、リードパターンは全てＩＴＯ膜で形成する。第１
図に於て１１は上側ガラス基板で、カラーフィルター１
２、透明保護膜１６、透明電極パターンの走査側画素パ
ターン１４が順次形成されている。１９は下側ガラス基
板で、画像側画素パターン２４とこれに連続する画像側
量カバターン１６が形成され、又走査側出力リードパタ
ーン２７を形成させている。１５はシール剤で、上側ガ
ラス基板１１に形成した走査側画素パターン１４と下側
ガラス基板１９に形成された画像側画素パターン２４と
の間の液晶層２２をシーリングしている。２１は走査側
ＩＣで、走査側ＩＣ入力リードパターン１８と走査側出
力リードパターン２７を導通させ、２０は画像側ＩＣで
画像側ＩＣ入力リードパターン１７と画像側出力リード
パターン１６を導通させており、この各々のＩＣ２０，
２１及び各リードパターン１８．２７．１６．１７は下
側ガラス基板１９に形成されている。そして上側ガラス
基板１１に形成されている走査側画素パターン１４を下
側ガラス基板１９に形成した走査側出力リードパターン
２７に導通するため導電ペーストである銀ペースト２３
を用いて行う構造をとっている。この様な構造にするこ
とにより下側ガラス基板１９に設けたＩＴＯ膜は全て高
温で形成すする低抵抗のＩＴＯ膜とすることができる。Next, the present invention will be explained using the drawings. A plan view and an A-A sectional view of a color liquid crystal cell that is an example of the present invention are shown in the first figure.
Shown in Figures (a) and (b). Each pixel pattern and lead pattern described below are all formed of an ITO film. 1st
In the figure, 11 is the upper glass substrate, and the color filter 1
2. A transparent protective film 16 and a scanning side pixel pattern 14 of a transparent electrode pattern are sequentially formed. Reference numeral 19 designates a lower glass substrate on which an image side pixel pattern 24 and an image side cover pattern 16 continuous thereto are formed, and a scanning side output lead pattern 27 is formed thereon. A sealant 15 seals the liquid crystal layer 22 between the scanning side pixel pattern 14 formed on the upper glass substrate 11 and the image side pixel pattern 24 formed on the lower glass substrate 19. Reference numeral 21 denotes a scanning side IC, which connects the scanning side IC input lead pattern 18 and the scanning side output lead pattern 27, and 20 denotes an image side IC, which connects the image side IC input lead pattern 17 and the image side output lead pattern 16. , each of these IC20,
21 and each lead pattern 18, 27, 16, 17 are formed on the lower glass substrate 19. Then, a silver paste 23 which is a conductive paste is used to connect the scanning side pixel pattern 14 formed on the upper glass substrate 11 to the scanning side output lead pattern 27 formed on the lower glass substrate 19.
It has a structure that uses . With such a structure, all the ITO films provided on the lower glass substrate 19 can be formed at high temperatures and have low resistance.
すなわち第２図に示した従来例では走査側ＩＣ入力リー
ドパターン１８はカラーフィルター１２が存在するため
低温で形成しなければならないので高抵抗ＩＴＱとなる
。この走査側ＩＣ入力リードパターン１８の高抵抗化は
顕著な画質の低下につながるが、本発明の様に走査側Ｉ
Ｃ入力リードパターン１８を第１の基板に低抵抗ＩＴＱ
で形成することにより画質の低下を防ぐことができる。That is, in the conventional example shown in FIG. 2, the scanning side IC input lead pattern 18 has a high resistance ITQ because it must be formed at a low temperature due to the presence of the color filter 12. This increase in resistance of the scanning side IC input lead pattern 18 leads to a noticeable deterioration in image quality, but as in the present invention, the scanning side IC input lead pattern 18 has a high resistance.
C input lead pattern 18 is placed on the first substrate with low resistance ITQ.
By forming the image with 200 yen, it is possible to prevent the image quality from deteriorating.
以上の説明で明らかなように、本発明によれば斜めから
見た場合の混色も無り、シかも画質の低下しない安定性
のある画像を得るカラー液晶パネルを作製することが出
来る。As is clear from the above description, according to the present invention, it is possible to produce a color liquid crystal panel that produces stable images without color mixing when viewed from an angle and with no deterioration in image quality.
第１図（ａｌは本発明のカラー液晶パネルの平面図、第
１図（ｂｌは本発明のカラー液晶パネルのＡ−Ａ線断面
図、第２図（ａｌは従来のカラー液晶パネルの平面図、
第２図（ｂ）は従来のカラー液晶パネルのＡ−Ａ線断面
図である。
１１．２５・・・・・・上側ガラス基板、１２・・・・
・・カラーフィルター、
１６・・・・・・透明保護膜、
１４．２９・・・・・・走査側画素パターン、１５・・
・・・・シール剤、
１６・・・・・・画像側出力リードパターン、１７・・
・・・・画像側ＩＣ入力リードパターン、１８・・・・
・・走査側ＩＣ入力リードパターン、１９．２６・・・
・・・下側ガラス基板、２０・・・・・・画像側ＩＣ。
２１・・・・・・走査側ＩＣ。
２２・・・・・・液晶層、
２６・・・・・・銀ペースト、
２４・・・・・・画像側画素パターン、２７．２８・・
・・・・走査側出力リードパターン。Figure 1 (al is a plan view of the color liquid crystal panel of the present invention, Figure 1 (bl is a sectional view taken along line A-A of the color liquid crystal panel of the present invention), Figure 2 (al is a plan view of a conventional color liquid crystal panel) ,
FIG. 2(b) is a cross-sectional view taken along line A--A of a conventional color liquid crystal panel. 11.25... Upper glass substrate, 12...
...Color filter, 16...Transparent protective film, 14.29...Scanning side pixel pattern, 15...
...Sealant, 16... Image side output lead pattern, 17...
...Image side IC input lead pattern, 18...
...Scanning side IC input lead pattern, 19.26...
. . . Lower glass substrate, 20 . . . Image side IC. 21...Scanning side IC. 22...Liquid crystal layer, 26...Silver paste, 24...Image side pixel pattern, 27.28...
...Scanning side output lead pattern.
Claims (1)
カラーフィルターとそのカラーフィルターを覆う透明保
護膜と透明電極パターンとを有する透明基板を第２の基
板とするカラー液晶パネルにおいて、前記第２の基板に
形成された透明電極パターン用のリードパターンを前記
第１の基板に形成し、前記第２の基板上の透明電極パタ
ーンと各対向する前記第１の基板上に形成したリードパ
ターンとを液晶セル内で導電ペーストにより導通させる
ことを特徴とするカラー液晶パネル。A transparent substrate having a transparent electrode pattern is used as a first substrate,
In a color liquid crystal panel in which a second substrate is a transparent substrate having a color filter, a transparent protective film covering the color filter, and a transparent electrode pattern, the lead pattern for the transparent electrode pattern formed on the second substrate is A collar formed on a first substrate, and electrically connected between a transparent electrode pattern on the second substrate and a lead pattern formed on each opposing first substrate within a liquid crystal cell using a conductive paste. LCD panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61039470A JPS62196626A (en) | 1986-02-25 | 1986-02-25 | Color liquid crystal panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61039470A JPS62196626A (en) | 1986-02-25 | 1986-02-25 | Color liquid crystal panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62196626A true JPS62196626A (en) | 1987-08-31 |
Family
ID=12553953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61039470A Pending JPS62196626A (en) | 1986-02-25 | 1986-02-25 | Color liquid crystal panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62196626A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01302227A (en) * | 1988-05-31 | 1989-12-06 | Asahi Glass Co Ltd | Color liquid crystal display element and color liquid crystal display device |
| JPH0337422U (en) * | 1989-08-22 | 1991-04-11 | ||
| WO1997032235A1 (en) * | 1996-02-29 | 1997-09-04 | Citizen Watch Co., Ltd. | Electrode structure of liquid crystal device |
| US6829030B2 (en) | 2000-06-15 | 2004-12-07 | Seiko Epson Corporation | Electro-optic device and electronic apparatus |
-
1986
- 1986-02-25 JP JP61039470A patent/JPS62196626A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01302227A (en) * | 1988-05-31 | 1989-12-06 | Asahi Glass Co Ltd | Color liquid crystal display element and color liquid crystal display device |
| JPH0337422U (en) * | 1989-08-22 | 1991-04-11 | ||
| WO1997032235A1 (en) * | 1996-02-29 | 1997-09-04 | Citizen Watch Co., Ltd. | Electrode structure of liquid crystal device |
| US6829030B2 (en) | 2000-06-15 | 2004-12-07 | Seiko Epson Corporation | Electro-optic device and electronic apparatus |
| US6963384B2 (en) | 2000-06-15 | 2005-11-08 | Seiko Epson Corporation | Electro-optical device and electronic apparatus |
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