JPH0352046B2 - - Google Patents
Info
- Publication number
- JPH0352046B2 JPH0352046B2 JP57029551A JP2955182A JPH0352046B2 JP H0352046 B2 JPH0352046 B2 JP H0352046B2 JP 57029551 A JP57029551 A JP 57029551A JP 2955182 A JP2955182 A JP 2955182A JP H0352046 B2 JPH0352046 B2 JP H0352046B2
- Authority
- JP
- Japan
- Prior art keywords
- pattern
- liquid crystal
- light
- display element
- crystal display
- 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 - Lifetime
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 230000000873 masking effect Effects 0.000 description 16
- 239000011521 glass Substances 0.000 description 9
- 238000009413 insulation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000005566 electron beam evaporation Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002265 prevention Effects 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】
本発明はネガ表示を行なう液晶表示素子に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid crystal display element that performs negative display.
近年、カメラに内蔵される日付け写し込み機構
の構成部品としてネガ表示を行なう液晶表示素子
が用いられている。 In recent years, liquid crystal display elements that perform negative display have been used as components of date imprint mechanisms built into cameras.
この液晶表示素子は、例えば日付を写し込む場
合、液晶表示素子に内設されたセグメント等のパ
ターン電極を選択して駆動電圧を印加することに
より表示画面内で写し込むべき日付を生起させ、
この日付部分を光透過領域他の背景部分を黒色
系、青色系等の光遮蔽領域とするものである。従
つて、背面側に設置された発光ダイオード等の光
源より出力された光がこの液晶表示素子を透過す
る際に日付部分のみ光が透過することになり、透
過した光が感光フイルムに到達して感光フイルム
上に所定の日付が写し込まれることになる。しか
しながら従来のネガ型液晶表示素子は一般的に液
晶のもつ光シヤツタリング効果の限界に起因して
背景部分の光遮蔽能力が不十分であるために、鮮
明な日付の写し込みを行なうことが難しかつた。 For example, when imprinting a date, this liquid crystal display element generates the date to be imprinted on the display screen by selecting pattern electrodes such as segments built into the liquid crystal display element and applying a driving voltage.
The date portion is a light-transmitting area and the background area is a light-shielding area in black, blue, or the like. Therefore, when the light output from a light source such as a light emitting diode installed on the back side passes through this liquid crystal display element, only the date portion is transmitted, and the transmitted light reaches the photosensitive film. A predetermined date is imprinted on the photosensitive film. However, conventional negative-type liquid crystal display elements generally have insufficient light-shielding ability in the background due to the limitations of the light-shattering effect of liquid crystals, making it difficult to imprint a clear date. Ta.
本発明は上記従来の欠点を解消するものであ
り、特にネガ表示を行なう場合に背景部分の光遮
蔽を良好に行なうことのできる新規有用な液晶表
示素子を提供することを目的とする。 The present invention has been made to overcome the above-mentioned conventional drawbacks, and aims to provide a new and useful liquid crystal display element that can effectively shield light from the background area, particularly when performing negative display.
以下、本発明に係る液晶表示素子の一実施例を
図面を用いて詳細に説明する。 Hereinafter, one embodiment of a liquid crystal display element according to the present invention will be described in detail using the drawings.
第１図は本発明の一実施例である液晶表示素子
の平面図を示す。本実施例の液晶表示素子は黒色
の２色性色素を含有するゲストホスト効果型液晶
表示素子であつて、ダイナミツク駆動されるもの
である。同図で１はセグメントガラス基板、２は
コモンガラス基板、３はマスキングパターンであ
る。該マスキングパターン３は表示パターンであ
る“１日日日”セグメントパターン以外の背景部
分を全て覆う。第２図は上記マスキングパターン
３を施したコモン側基板の側面断面図である。同
図で２はコモンガラス基板、３はCr、Al等の金
属膜からなるマスキングパターン、４は上記マス
キングパターン３上を被覆するように電子ビーム
蒸着法で堆積された無色透明なSiO2無機蒸着膜、
５は該無機蒸着膜４上を被覆するPI（ポリイミ
ド）有機絶縁膜である。６は該有機絶縁膜５上に
形成されるITO（In2O3＋SnO2）からなる透明電
極パターンである。上記絶縁膜４，５は上記マス
キングパターン３と上記透明電極パターン６との
リーク防止の為に設けられたものである。 FIG. 1 shows a plan view of a liquid crystal display element which is an embodiment of the present invention. The liquid crystal display element of this example is a guest-host effect type liquid crystal display element containing a black dichroic dye, and is dynamically driven. In the figure, 1 is a segment glass substrate, 2 is a common glass substrate, and 3 is a masking pattern. The masking pattern 3 covers all the background portions other than the display pattern "day day day" segment pattern. FIG. 2 is a side sectional view of the common side substrate on which the masking pattern 3 is applied. In the figure, 2 is a common glass substrate, 3 is a masking pattern made of a metal film such as Cr or Al, and 4 is a colorless and transparent SiO 2 inorganic vapor deposited by electron beam evaporation to cover the masking pattern 3. film,
5 is a PI (polyimide) organic insulating film that covers the inorganic vapor deposited film 4. 6 is a transparent electrode pattern formed on the organic insulating film 5 and made of ITO (In 2 O 3 +SnO 2 ). The insulating films 4 and 5 are provided to prevent leakage between the masking pattern 3 and the transparent electrode pattern 6.
一方、セグメントガラス基板１には第１図に示
す如く内面に“１日日日”型のセグメントパター
ンが形成されておりこのセグメントパターンの透
明電極とコモンガラス基板２上の透明電極パター
ン６は外部回路に接続され、駆動電圧が選択的に
印加される。セグメントガラス基板１とコモンガ
ラス基板２の間には黒色の２色性色素を含有した
ゲストホスト効果型の液晶が挿入される。 On the other hand, as shown in FIG. 1, the segment glass substrate 1 has a "1 day day day" type segment pattern formed on its inner surface, and the transparent electrodes of this segment pattern and the transparent electrode pattern 6 on the common glass substrate 2 It is connected to a circuit and a driving voltage is selectively applied. A guest-host effect type liquid crystal containing a black dichroic dye is inserted between the segment glass substrate 1 and the common glass substrate 2.
セグメントパターンを選択し、このセグメント
パターンと透明電極パターン６間に駆動電圧を印
加すると、電圧の印加された領域はゲストホスト
効果によつて光透過状態となり、電圧の印加され
ないセグメントパターン領域及びセグメントパタ
ーン領域以外の背景領域は２色性色素の黒色又は
２色性色素の黒色とマスキングパターン３によつ
て光が透過しない領域となる。これによつてネガ
型の表示が行なわれる。 When a segment pattern is selected and a driving voltage is applied between this segment pattern and the transparent electrode pattern 6, the area to which the voltage is applied becomes a light-transmissive state due to the guest-host effect, and the segment pattern area and the segment pattern to which no voltage is applied become transparent. The background area other than the area becomes an area through which light does not pass due to the black color of the dichroic dye or the black color of the dichroic dye and the masking pattern 3. This results in negative type display.
次に上記マスキングパターン３と透明電極パタ
ーン６の間の電気的絶縁を上記無機蒸着膜４と上
記有機絶縁膜５の２層構造の膜にて行なつた理由
について説明する。一般にSiO2等の無機蒸着膜
は内在するピンホールの為に2μｍ程度の膜厚に
設定しても完全な絶縁膜にはなり得ない。従つて
絶縁性を確保する為には比較的厚みを大きくしな
ければならない。一方PI等の有機絶縁膜は2μｍ
程度の膜厚で略々完全な絶縁性が得られる。しか
しながら有機絶縁膜は膜厚が2μｍ程度では着色
を呈する為に更に薄膜化しなければならない。
3000〜5000Å程度まで薄膜化すれば着色性が無視
できる程度になるがしかしこの膜厚では完全な絶
縁性を得ることができない。従つて無機絶縁膜、
有機絶縁膜のいずれも単独で用いた場合は薄くか
つ透明な状態を確保することは困難である。本実
施例ではSiO2を電子ビーム蒸着法で1μｍ、PIを
3000〜5000Åの厚さに設定して２層構造の絶縁膜
を構成することにより透明でかつ完全な絶縁性を
具備する絶縁膜の得られることが確認された。従
つて、上記無機蒸着膜４と上記有機絶縁膜５との
２層膜で上記マスキングパターン３と上記透明電
極パターン６の間の絶縁を行なうことによつて液
晶表示素子の光学的特性は上記絶縁膜によつても
劣化せず、しかも上記絶縁膜の絶縁性が良好であ
る為にマスキングパターンとしてパターン精度の
高い金属膜を使うことが可能となる。 Next, the reason why the electrical insulation between the masking pattern 3 and the transparent electrode pattern 6 is provided by the two-layer structure of the inorganic vapor deposited film 4 and the organic insulating film 5 will be explained. Generally, an inorganic vapor deposited film such as SiO 2 cannot become a perfect insulating film even if the film thickness is set to about 2 μm due to inherent pinholes. Therefore, in order to ensure insulation, the thickness must be relatively large. On the other hand, organic insulating films such as PI are 2 μm thick.
Substantially complete insulation can be obtained with a film thickness of about 100%. However, organic insulating films exhibit coloration when the film thickness is about 2 μm, so they must be made even thinner.
If the film is thinned to about 3000 to 5000 Å, the coloring property becomes negligible, but with this film thickness, complete insulation cannot be obtained. Therefore, inorganic insulating film,
When any of the organic insulating films is used alone, it is difficult to ensure a thin and transparent state. In this example, SiO 2 was deposited with a thickness of 1 μm using electron beam evaporation, and PI was deposited with a thickness of 1 μm.
It was confirmed that by setting the thickness to 3000 to 5000 Å to form a two-layered insulating film, an insulating film that is transparent and has perfect insulation properties can be obtained. Therefore, by providing insulation between the masking pattern 3 and the transparent electrode pattern 6 with the two-layer film of the inorganic vapor deposited film 4 and the organic insulating film 5, the optical characteristics of the liquid crystal display element can be improved by providing insulation between the masking pattern 3 and the transparent electrode pattern 6. Since the insulating film does not deteriorate even when the film is used, and the insulating properties of the insulating film are good, it becomes possible to use a metal film with high pattern accuracy as a masking pattern.
以上の実施例はダイナミツク駆動の表示素子で
あつたが、スタテイツク駆動の表示素子であつて
も本発明は適用可能である。但しスタテイツク駆
動の表示素子のコモン電極は単一電極であるので
マスキングパターンと透明電極パターンとのリー
ク防止は必要ない。しかしスタテイツク駆動の表
示素子であつてもセグメント電極側にマスキング
パターンを施した場合はリーク防止が必要であ
る。 Although the above embodiments are dynamically driven display elements, the present invention is also applicable to statically driven display elements. However, since the common electrode of a statically driven display element is a single electrode, there is no need to prevent leakage between the masking pattern and the transparent electrode pattern. However, even in a statically driven display element, leak prevention is necessary when a masking pattern is applied to the segment electrode side.
上記実施例ではゲストホスト効果型の液晶表示
素子を示したがネガ表示を行なうものであれば
TN（ツイステツドイネマチツク）−FEM（電界効
果型）液晶表示素子であつてもよい。 In the above embodiment, a guest-host effect type liquid crystal display element was shown, but if it performs a negative display,
It may be a TN (Twisted Inematic)-FEM (Field Effect) liquid crystal display element.
又、上記実施例ではマスキングパターンを一方
の基板にのみ形成したが、両方の基板に設ければ
光遮蔽効果は一層期待できる。 Further, in the above embodiment, the masking pattern was formed only on one substrate, but if it is provided on both substrates, a further light shielding effect can be expected.
以上説明した本発明によれば、表示パターン部
以外の個所での光遮蔽能力が向上するのでネガ表
示を行なう液晶表示素子において表示コントラス
トが良好となり、またマスキングパターンと電極
パターン間は着色がなく絶縁性の高い無機絶縁膜
とポリイミド絶縁膜の２層構造で絶縁されてお
り、電気的に信頼性の高い構造が得られる。 According to the present invention described above, the light shielding ability in areas other than the display pattern portion is improved, so that the display contrast is improved in a liquid crystal display element that performs negative display, and there is no coloration between the masking pattern and the electrode pattern, and there is no insulation. It is insulated with a two-layer structure consisting of a highly durable inorganic insulating film and a polyimide insulating film, resulting in a highly electrically reliable structure.
第１図は本発明に係る液晶表示素子の一実施例
の平面図、第２図はその一部側面断面図を示す。
図中、１：セグメントガラス基板、２：コモン
ガラス基板、３：マスキングパターン、４：無機
絶縁膜、５：有機絶縁膜、６：透明電極。
FIG. 1 is a plan view of an embodiment of a liquid crystal display element according to the present invention, and FIG. 2 is a partial side sectional view thereof. In the figure, 1: segment glass substrate, 2: common glass substrate, 3: masking pattern, 4: inorganic insulating film, 5: organic insulating film, 6: transparent electrode.
Claims (1)
間隙に液晶が封入され、前記パターン電極を介し
て前記液晶に駆動電圧を印加することにより、駆
動電圧の印加された領域が光透過領域を形成しか
つ駆動電圧の印加されない領域が着色性背景とな
る光遮蔽領域を形成するネガ表示を実行する液晶
表示素子において、前記基板面には表示すべきパ
ターンの表出する領域以外の領域に光遮蔽用金属
膜パターンが配設され、該金属膜パターンと前記
パターン電極間には厚さ1μｍ程度の無機絶縁膜
と厚さ3000Å〜5000Åのポリイミド絶縁膜の２層
構造が介挿されていることを特徴とする液晶表示
素子。1 A liquid crystal is sealed in the gap between two substrates each having a patterned electrode formed on the inner surface, and by applying a driving voltage to the liquid crystal via the patterned electrode, the area to which the driving voltage is applied forms a light-transmitting area. In addition, in a liquid crystal display element that performs negative display in which a region to which no driving voltage is applied forms a light-shielding region that serves as a colored background, there is a light-shielding region on the substrate surface other than the region where the pattern to be displayed is exposed. A metal film pattern is provided, and a two-layer structure of an inorganic insulating film with a thickness of about 1 μm and a polyimide insulating film with a thickness of 3000 Å to 5000 Å is interposed between the metal film pattern and the pattern electrode. Characteristic liquid crystal display element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57029551A JPS58145982A (en) | 1982-02-24 | 1982-02-24 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57029551A JPS58145982A (en) | 1982-02-24 | 1982-02-24 | Liquid crystal display element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58145982A JPS58145982A (en) | 1983-08-31 |
| JPH0352046B2 true JPH0352046B2 (en) | 1991-08-08 |
Family
ID=12279270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57029551A Granted JPS58145982A (en) | 1982-02-24 | 1982-02-24 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58145982A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60172131U (en) * | 1984-04-20 | 1985-11-14 | ホシデン株式会社 | Color LCD display |
| JP2546804Y2 (en) * | 1991-03-15 | 1997-09-03 | 自動車機器株式会社 | Integral type power steering device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4930058A (en) * | 1972-07-17 | 1974-03-18 | ||
| JPS50114995A (en) * | 1974-02-19 | 1975-09-09 | ||
| JPS5130752A (en) * | 1974-09-07 | 1976-03-16 | Matsushita Electric Ind Co Ltd | ZENMENHANSHAGATAEKISHOHYOJIPANERU |
| JPS53126954A (en) * | 1977-04-13 | 1978-11-06 | Hitachi Ltd | Liquid crystal display element |
-
1982
- 1982-02-24 JP JP57029551A patent/JPS58145982A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4930058A (en) * | 1972-07-17 | 1974-03-18 | ||
| JPS50114995A (en) * | 1974-02-19 | 1975-09-09 | ||
| JPS5130752A (en) * | 1974-09-07 | 1976-03-16 | Matsushita Electric Ind Co Ltd | ZENMENHANSHAGATAEKISHOHYOJIPANERU |
| JPS53126954A (en) * | 1977-04-13 | 1978-11-06 | Hitachi Ltd | Liquid crystal display element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58145982A (en) | 1983-08-31 |
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