JPH0147796B2 - - Google Patents
Info
- Publication number
- JPH0147796B2 JPH0147796B2 JP57039884A JP3988482A JPH0147796B2 JP H0147796 B2 JPH0147796 B2 JP H0147796B2 JP 57039884 A JP57039884 A JP 57039884A JP 3988482 A JP3988482 A JP 3988482A JP H0147796 B2 JPH0147796 B2 JP H0147796B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- substrate
- pattern
- liquid crystal
- mask
- 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.)
- Expired
Links
- 239000000758 substrate Substances 0.000 claims description 33
- 239000004973 liquid crystal related substance Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims 4
- 238000000576 coating method Methods 0.000 claims 4
- 238000000034 method Methods 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 210000002858 crystal cell Anatomy 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 229910001128 Sn alloy Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】 本発明は液晶表示装置に関するものである。[Detailed description of the invention] The present invention relates to a liquid crystal display device.
液晶表示装置は表示様式によつて２つに分類で
きる。即ち、ポジタイプとネガタイプである。 Liquid crystal display devices can be classified into two types depending on display format. That is, they are positive type and negative type.
ポジタイプ表示は、無電界のときは光を透過す
るが電界を印加すると透光性の地に暗黒像が現出
する。 A positive type display transmits light when there is no electric field, but when an electric field is applied, a dark image appears on the transparent background.
それに対しネガタイプ表示は、無電界のときに
光を透過しないが電界を印加すると暗黒の地に透
光性の像が現出する。 On the other hand, a negative type display does not transmit light when there is no electric field, but when an electric field is applied, a transparent image appears on a dark background.
ネガタイプ表示において、無電界領域の遮光は
偏光板及び液晶の組み合わせによつて行なわれて
いるが、これらの効果は充分でなく、そのためネ
ガタイプ表示においては表示面の電極パターン領
域以外の部分に遮光体（マスク）を設ける必要が
ある。従来はマスクとして例えばクロム等の金属
が多用されている。 In negative type displays, light shielding in the field-free area is achieved by a combination of polarizing plates and liquid crystals, but these effects are not sufficient, so in negative type displays, light shielding is used in areas other than the electrode pattern area of the display surface. It is necessary to provide a (mask). Conventionally, metals such as chromium are often used as masks.
ところで、この種のマスクはガラス基板面の透
明電極が設けられた面と同じ側に設ける方が、反
対側の面に設けるよりも遮光効果は顕著である。 By the way, when this type of mask is provided on the same side of the glass substrate as the transparent electrode is provided, the light blocking effect is more pronounced than when it is provided on the opposite side.
しかし、透明電極と同じ側に金属マスクを設け
ようとした場合、マスクと透明電極との絶縁が難
しいため、スタテイツク駆動方式を適用する場合
に限られるという問題があつた。 However, when attempting to provide a metal mask on the same side as the transparent electrode, there was a problem in that it was difficult to insulate the mask and the transparent electrode, so that the static drive method could only be applied.
即ち、ダイナミツク駆動の場合には金属による
効果的な遮光ができなかつた。例えば、第１図及
び第２図に見られる様に、コモン電極基板１及び
セグメント電極基板２上に夫々コモン電極３及び
セグメント電極４を形成しそれらを貼り合わせて
液晶セルを作製し、コモン電極３を構成する個別
電極要素とセグメント電極４を構成する個別電極
要素を瞬時選択して電圧印加するとともに選択す
る電極要素を高速で切換えることにより、ダイナ
ミツク駆動方式による数値表示が実行される。
尚、第１図及び第２図に示すコモン電極基板１及
びセグメント電極基板２はいずれも液晶セル作製
時の基板内面となる面を示しており、第１図及び
第２図に示される面が互いに対向して液晶セルが
形成される。作製された液晶セルの駆動方式に1/
２デユーテイ駆動方式を採用すると、コモン電極
３を２分割する必要がある。ところが、該コモン
電極３ａ，３ｂ上に一体的にマスク５を形成した
場合（第３図）にはコモン電極３ａ，３ｂ間の電
気的分離が不可能となり、動作させることができ
ない。 That is, in the case of dynamic drive, effective light shielding by metal could not be achieved. For example, as shown in FIGS. 1 and 2, a common electrode 3 and a segment electrode 4 are formed on a common electrode substrate 1 and a segment electrode substrate 2, respectively, and these are bonded together to produce a liquid crystal cell, and the common electrode By instantaneously selecting the individual electrode elements constituting the segment electrodes 3 and the individual electrode elements constituting the segment electrodes 4, applying a voltage, and switching the selected electrode elements at high speed, numerical display using a dynamic drive method is executed.
Note that the common electrode substrate 1 and the segment electrode substrate 2 shown in FIGS. 1 and 2 both show the surfaces that will become the inner surfaces of the substrates when manufacturing the liquid crystal cell, and the surfaces shown in FIGS. Liquid crystal cells are formed facing each other. 1/ in the drive method of the fabricated liquid crystal cell.
When a 2-duty drive method is adopted, it is necessary to divide the common electrode 3 into two. However, when the mask 5 is integrally formed on the common electrodes 3a and 3b (FIG. 3), it becomes impossible to electrically separate the common electrodes 3a and 3b, and the device cannot be operated.
又、金属マスクとしてクロムを用いた場合には
次の様な欠点がある。即ち、クロム金属は公害で
有名であり人体に有害な悪影響を与える。特にク
ロム金属面をケミカルエツチングする場合は六価
クロムが溶出してきて極めて有害となる。そのた
めエツチング処理済の廃液に還元剤を添加する等
の特別処理を行つて棄却しなければならずコスト
的に高くつく。 Furthermore, when chromium is used as a metal mask, there are the following drawbacks. That is, chromium metal is notorious for pollution and has harmful effects on the human body. In particular, when chemically etching a chromium metal surface, hexavalent chromium is eluted and is extremely harmful. Therefore, it is necessary to perform special treatment such as adding a reducing agent to the etched waste liquid before discarding it, which increases the cost.
本発明は上記の事項に鑑み、1/2デユーテイ以
上の駆動方式に適用可能な遮光用金属マスクを施
したネガタイプ液晶表示装置を提供することを目
的とする。 SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide a negative type liquid crystal display device provided with a light-shielding metal mask that can be applied to a driving method of 1/2 duty or more.
本発明の実施例を図面とともに説明する。 Embodiments of the present invention will be described with reference to the drawings.
表示パターン外の背景部を遮光するマスクを施
す電極基板は、第１図の様に２つに分割されたコ
モン電極３ａ，３ｂを形成したコモン電極基板１
及びコモン電極３ａ，３ｂの分割に対応させて1/
２デユーテイ駆動が可能になるように第２図に示
すセグメント電極４を形成したセグメント電極基
板２が用いられる。上記コモン電極３ａ，３ｂ、
セグメント電極４は共にIn2O3／SnO2膜で形成さ
れている。 The electrode substrate on which a mask for shielding the background area outside the display pattern is applied is a common electrode substrate 1 on which common electrodes 3a and 3b divided into two are formed as shown in FIG.
and 1/corresponding to the division of common electrodes 3a and 3b.
A segment electrode substrate 2 on which segment electrodes 4 shown in FIG. 2 are formed is used so as to enable two-duty driving. The common electrodes 3a, 3b,
Both segment electrodes 4 are formed of In 2 O 3 /SnO 2 films.
上記コモン電極３ａ，３ｂ、セグメント電極４
を形成するに先立つて、本実施例ではコモン電極
基板１及びセグメント電極基板２の両側にIn−
Sn合金の遮光用マスク５ａ，５ｂ，５ｃを形成
する。これらのマスク５ａ，５ｂ，５ｃは1/2デ
ユーテイの液晶駆動を可能にするため、次に説明
する形状に作製される。 The above common electrodes 3a, 3b, segment electrode 4
In this embodiment, before forming the common electrode substrate 1 and the segment electrode substrate 2, In-
Light-shielding masks 5a, 5b, and 5c made of Sn alloy are formed. These masks 5a, 5b, and 5c are manufactured in the shape described below in order to enable 1/2 duty liquid crystal driving.
第４図の様に、マスク５ａはコモン電極３ａが
表示部分となる様にコモン電極基板１のほぼ半分
の領域を覆い、同様にマスク５ｂはコモン電極３
ｂが表示部分となる様にコモン電極基板１の上記
とは別の半分の領域を覆う。マスク５ａ，５ｂは
電気的に分離する必要があるため、該マスク５
ａ，５ｂ間に個々の電極要素であるコモン電極３
ａ，３ｂ相互を分割している境界部分に沿つて微
細間隙となる欠如部分６を設ける。 As shown in FIG. 4, the mask 5a covers approximately half the area of the common electrode substrate 1 so that the common electrode 3a becomes a display area, and the mask 5b similarly covers the common electrode 3a.
Another half area of the common electrode substrate 1 is covered so that b becomes a display area. Since the masks 5a and 5b need to be electrically isolated,
A common electrode 3, which is an individual electrode element, is placed between a and 5b.
A missing portion 6 serving as a minute gap is provided along the boundary portion that separates a and 3b.
上記のコモン電極基板１上の欠如部分６はセグ
メント電極基板２側で被覆する。即ち、第５図の
如く、コモン電極基板１の欠如部分６に対向する
セグメント電極基板２上の領域にマスク５ｃを形
成する。その際セグメント電極４の表示部分は被
覆しない様にする。またマスク５ｃは遮光用補助
被膜となるものでありセグメント電極４の個々の
電極要素を電気的に導通させないように適宜分割
配置されている。第５図に示されているマスク５
ｃの形状は、上半分が第２図に示すセグメント電
極４の上端部分とのみ交差しており、下半分が第
２図に示すセグメント電極４の下端部分とのみ交
差している。マスク５ｃの中央の切欠部分には第
２図に示すセグメント電極４の中央部分が配設さ
れる。 The missing portion 6 on the common electrode substrate 1 is covered with the segment electrode substrate 2 side. That is, as shown in FIG. 5, a mask 5c is formed in a region on the segment electrode substrate 2 facing the missing portion 6 of the common electrode substrate 1. At this time, the display portion of the segment electrode 4 is not covered. Further, the mask 5c serves as an auxiliary film for shielding light, and is appropriately divided and arranged so as not to electrically conduct the individual electrode elements of the segment electrode 4. Mask 5 shown in FIG.
In the shape c, the upper half intersects only the upper end portion of the segment electrode 4 shown in FIG. 2, and the lower half intersects only the lower end portion of the segment electrode 4 shown in FIG. The central portion of the segment electrode 4 shown in FIG. 2 is arranged in the central notch of the mask 5c.
コモン電極基板１及びセグメント電極基板２に
形成したマスク５ａ，５ｂ，５ｃが組み合わされ
てネガ表示の遮光部分を形成する。 Masks 5a, 5b, and 5c formed on the common electrode substrate 1 and the segment electrode substrate 2 are combined to form a light-shielding portion for negative display.
もちろん、本実施例の1/2デユーテイ駆動方式
に限定することなく、１／ｎ（ｎは２以上の整数）
デユーテイ駆動方式にも電極の分割を考慮したマ
スク形状とすることにより本発明は適用できる。 Of course, the invention is not limited to the 1/2 duty drive method of this embodiment, and 1/n (n is an integer of 2 or more)
The present invention can also be applied to the duty drive method by providing a mask shape that takes electrode division into consideration.
ここで、マスク５ａ，５ｂ，５ｃは、各電極基
板の透明電極がIn2O3／SnO2膜で形成されている
ことから、In−Sn合金で形成される。この種の
合金は形成する際にケミカルエツチングしても人
体には無害であり、又、電極基板面に形成する
際、電極パターンとマスクが同じ設備を利用して
作製することができる。 Here, the masks 5a, 5b, and 5c are formed of an In - Sn alloy because the transparent electrodes of each electrode substrate are formed of an In2O3 / SnO2 film. This type of alloy is harmless to the human body even if it is chemically etched during formation, and when forming the electrode pattern on the surface of the electrode substrate, the electrode pattern and the mask can be manufactured using the same equipment.
以上の様に本発明によれば、１／ｎ（ｎは２以
上の整数）デユーテイ駆動方式においても支障を
起さない遮光用金属マスクを施した液晶表示装置
を得ることができる。 As described above, according to the present invention, it is possible to obtain a liquid crystal display device provided with a light-shielding metal mask that does not cause any trouble even in a 1/n (n is an integer of 2 or more) duty drive system.
第１図は本発明の適用可能なコモン電極基板の
平面図、第２図は本発明の適用可能なセグメント
電極基板の平面図、第３図は従来のマスク実施例
を施したコモン電極基板の平面図、第４図は本発
明のマスク実施例を施したコモン電極基板の平面
図、第５図は本発明のマスク実施例を施したセグ
メント電極基板の平面図である。
１……コモン電極基板、２……セグメント電極
基板、３，３ａ，３ｂ……コモン電極、４……セ
グメント電極、５，５ａ，５ｂ，５ｃ……マス
ク、６……欠如部分。
FIG. 1 is a plan view of a common electrode substrate to which the present invention is applicable, FIG. 2 is a plan view of a segment electrode substrate to which the present invention is applicable, and FIG. 3 is a plan view of a common electrode substrate to which a conventional mask embodiment is applied. FIG. 4 is a plan view of a common electrode substrate to which a mask embodiment of the present invention is applied, and FIG. 5 is a plan view of a segment electrode substrate to which a mask embodiment of the present invention is applied. 1... Common electrode substrate, 2... Segment electrode substrate, 3, 3a, 3b... Common electrode, 4... Segment electrode, 5, 5a, 5b, 5c... Mask, 6... Missing part.
Claims (1)
１のパターン電極と該第１のパターン電極以外の
面領域を被覆する遮光用の金属被膜とを有する第
１の基板と、前記第１のパターン電極と共働して
前記表示パターンを生起するために配設された第
２のパターン電極を有する第２の基板と、該第２
の基板と前記第１の基板との対向間隙に封入され
た液晶層と、を具備して成る液晶表示装置におい
て、前記第１のパターン電極は相互に分割された
複数の電極要素から成り、前記金属被膜は該電極
要素の略々分割境界に沿つて形成された微細間隙
で該電極要素毎に複数に分割され、前記第２の基
板には前記微細間隙を遮光する金属補助被膜が形
成され、該金属補助被膜は前記第２のパターン電
極を構成する個別電極毎に電気的に独立して配置
されていることを特徴とする液晶表示装置。1. A first substrate having a first pattern electrode arranged to generate a display pattern and a light-shielding metal coating covering a surface area other than the first pattern electrode, and the first pattern a second substrate having a second patterned electrode arranged to cooperate with the electrode to produce the display pattern;
A liquid crystal display device comprising a substrate and a liquid crystal layer sealed in an opposing gap between the first substrate, wherein the first pattern electrode is composed of a plurality of mutually divided electrode elements; The metal coating is divided into a plurality of parts for each electrode element by micro gaps formed substantially along the dividing boundaries of the electrode elements, and a metal auxiliary coating is formed on the second substrate to shield the micro gaps from light, A liquid crystal display device characterized in that the metal auxiliary coating is arranged electrically independently for each individual electrode constituting the second pattern electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3988482A JPS58156982A (en) | 1982-03-11 | 1982-03-11 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3988482A JPS58156982A (en) | 1982-03-11 | 1982-03-11 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58156982A JPS58156982A (en) | 1983-09-19 |
| JPH0147796B2 true JPH0147796B2 (en) | 1989-10-16 |
Family
ID=12565399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3988482A Granted JPS58156982A (en) | 1982-03-11 | 1982-03-11 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58156982A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532897B2 (en) * | 1973-03-16 | 1980-08-27 | ||
| JPS56165168A (en) * | 1980-05-26 | 1981-12-18 | Seiko Epson Corp | Imaging device |
| JPS5734522A (en) * | 1980-08-09 | 1982-02-24 | Dainippon Printing Co Ltd | Production of electrode substrate for liquid crystal display element |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532897U (en) * | 1978-08-25 | 1980-03-03 | ||
| JPS55137121U (en) * | 1979-03-20 | 1980-09-30 |
-
1982
- 1982-03-11 JP JP3988482A patent/JPS58156982A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532897B2 (en) * | 1973-03-16 | 1980-08-27 | ||
| JPS56165168A (en) * | 1980-05-26 | 1981-12-18 | Seiko Epson Corp | Imaging device |
| JPS5734522A (en) * | 1980-08-09 | 1982-02-24 | Dainippon Printing Co Ltd | Production of electrode substrate for liquid crystal display element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58156982A (en) | 1983-09-19 |
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