JPH05313124A - Multicolored liquid crystal display device - Google Patents

Multicolored liquid crystal display device

Info

Publication number
JPH05313124A
JPH05313124A JP4115833A JP11583392A JPH05313124A JP H05313124 A JPH05313124 A JP H05313124A JP 4115833 A JP4115833 A JP 4115833A JP 11583392 A JP11583392 A JP 11583392A JP H05313124 A JPH05313124 A JP H05313124A
Authority
JP
Japan
Prior art keywords
liquid crystal
color
red
green
display device
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
Application number
JP4115833A
Other languages
Japanese (ja)
Inventor
Hideaki Okumura
英明 奥村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP4115833A priority Critical patent/JPH05313124A/en
Publication of JPH05313124A publication Critical patent/JPH05313124A/en
Pending legal-status Critical Current

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  • Liquid Crystal (AREA)

Abstract

PURPOSE:To provide the multicolored liquid crystal device in simple structure which stably displays plural colors and is inexpensive by providing a color filter layer on at least either of the internal surface and external surface of a nematic liquid crystal cell. CONSTITUTION:The liquid crystal display device is constituted by arranging red color filters R7 and green color filters G8 alternately on the transparent electrode 6 of one substrate 10 of a simple matrix type liquid crystal display device using nematic liquid crystal which is twisted and oriented at 180-360 deg. and further arranging polarizing plates 11 on the top and reverse of the liquid crystal cell. Thus, the red and green color filters 7 and 8 are arranged by turns on respective pixels formed of the transparent electrode 6 to obtain specific spectral characteristics. Namely, the both are black in nonselection mode, but red in red selection mode, green in green selection mode, and yellow as a mixed color when both the colors are selected, thereby making a four-color display of red, green, and yellow on a black background.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ねじれ角が180度か
ら360度の範囲のねじれ配向したネマチック液晶を用
いた液晶表示装置(以下STNと略す)のマルチカラー
表示に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-color display of a liquid crystal display device (hereinafter abbreviated as STN) using a nematic liquid crystal having a twist angle of 180 to 360 degrees.

【0002】[0002]

【従来の技術】従来、STNの表示は、一般的にブルー
モードと呼ばれる青のバックグラウンドに白の表示を行
なうもの、あるいは一般的にイエローモードと呼ばれる
黄のバックグラウンドに黒の表示を行なうものなどの様
に、下地色が1色のものが一般的であった。近年、表示
される情報が多種になり、それにともなって表示もカラ
ー化の要求が強くなってきた。STNでマルチカラー表
示をする場合、電圧を適当に選択し表示色を変えるティ
ントモード、また、STNに液晶層やフィルムなどの補
償板を組み合せた白黒表示(NTN、FTNと呼ばれ
る)とカラーフィルターを組み合せる方法などがある。
2. Description of the Related Art Conventionally, STN display is such that white is displayed on a blue background generally called blue mode, or black is displayed on a yellow background commonly called yellow mode. It is common that the background color is one color, such as. In recent years, various kinds of information are displayed, and accordingly, there is an increasing demand for color display. When performing multi-color display on the STN, a tint mode that appropriately selects the voltage to change the display color, and a black-and-white display (called NTN or FTN) that combines the STN with a compensator such as a liquid crystal layer or film and a color filter There are ways to combine them.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、前述の
ティントモードの場合、色純度が悪い、微小な電圧差で
表示色が変わるので色のコントロールがしにくいなどの
問題があった。また、前述のNTN、FTNにカラーフ
ィルターを組み合わせる場合、安定した表示色が得られ
る反面、構造がSTNより複雑になるため工程が多くな
り、高コスト、低歩留まりといった欠点を持っていた。
However, in the tint mode described above, there are problems such as poor color purity and difficulty in controlling the color because the display color changes due to a minute voltage difference. Further, when a color filter is combined with the above-mentioned NTN and FTN, a stable display color can be obtained, but the structure is more complicated than STN, so that the number of steps is increased and there are drawbacks such as high cost and low yield.

【0004】そこで本発明は、上記問題を解決するため
になされたものであり、その目的とするところは、簡単
な構造で複数の色を安定して表示できる安価なマルチカ
ラー液晶装置を提供することにある。
Therefore, the present invention has been made to solve the above problems, and an object thereof is to provide an inexpensive multi-color liquid crystal device capable of stably displaying a plurality of colors with a simple structure. Especially.

【0005】[0005]

【課題を解決するための手段】即ち、本発明のマルチカ
ラー液晶装置は、対向して配置された一対の電極基板間
に180度から360度の範囲でねじれ配向したネマチ
ック液晶を挟持してなる液晶セルと、前記液晶セルの内
面または外面の少なくとも一方にカラーフィルター層を
設けた事を特徴とする。
That is, the multi-color liquid crystal device of the present invention comprises a pair of electrode substrates arranged opposite to each other and sandwiching a nematic liquid crystal which is twisted and oriented in the range of 180 to 360 degrees. The liquid crystal cell and a color filter layer are provided on at least one of the inner surface and the outer surface of the liquid crystal cell.

【0006】[0006]

【実施例】【Example】

<実施例1>従来のSTNのブルーモードは、図2に示
すような分光特性を有し、非選択時4には青色であり、
選択時5にはほぼ白色の表示となる。
<Example 1> The blue mode of the conventional STN has a spectral characteristic as shown in FIG. 2, and is blue when not selected 4,
When selected, the display is almost white.

【0007】本実施例では図3に示す通り、単純マトリ
クス型液晶装置において、片側の基板10の透明電極上
6に、赤色のカラーフィルターR7と緑色のカラーフィ
ルターG8を交互に配置した。カラーフィルターは感光
性樹脂中に適当な顔料を練り込んだ材料を基板上にコー
ティングした後、光を使ってパターン状に露光して現像
したものを使った。カラーフィルターの厚さは約1.5
μmであった。更に偏光板11を液晶セルの上下に配置
し、駆動回路を接続して液晶表示装置を形成した。透明
電極で形成される各画素に交互に、赤色と緑色のカラー
フィルターを配置する事により、図1に示す様な分光特
性となった。つまり、両色とも非選択時1には黒色であ
り、赤選択時には赤色、緑選択時には緑色、両色選択時
には混色により黄色の表示となり、黒地に赤緑黄の4色
表示となった。
In this embodiment, as shown in FIG. 3, in a simple matrix type liquid crystal device, a red color filter R7 and a green color filter G8 are alternately arranged on a transparent electrode 6 of a substrate 10 on one side. As the color filter, a material obtained by coating a substrate with a material prepared by kneading an appropriate pigment in a photosensitive resin, exposing it to a pattern with light and developing it was used. Color filter thickness is about 1.5
was μm. Further, the polarizing plates 11 were arranged above and below the liquid crystal cell, and a driving circuit was connected to form a liquid crystal display device. By alternately arranging the red and green color filters in each pixel formed by the transparent electrode, the spectral characteristic as shown in FIG. 1 was obtained. In other words, both colors are black when not selected 1, red when red is selected, green when green is selected, yellow is displayed by mixing colors when both colors are selected, and four colors of red, green, and yellow are displayed on a black background.

【0008】尚、本実施例ではカラーフィルターの厚さ
を1.5μmとしたが、カラーフィルターはできるだけ
薄いものがよい。また、本実施例以外に、染色法、電着
法等周知の方法により形成された2μm以下で色純度の
よいカラーフィルターを使うことができる。
Although the thickness of the color filter is 1.5 μm in this embodiment, the color filter should be as thin as possible. In addition to the present embodiment, a color filter having a color purity of 2 μm or less and good color purity formed by a known method such as a dyeing method or an electrodeposition method can be used.

【0009】<実施例2>図4に示すように、カラーフ
ィルターを液晶セルの外面に形成しその外側に一対の偏
光板を配置した液晶装置を作成した。本実施例の液晶装
置を、オーバーヘッドプロジェクター上に載置して使用
した。この場合、透明電極とカラーフィルターの間隔が
大きくても視差が生じないため、液晶セルの外面にカラ
ーフィルターを形成しても支障はなかった。
Example 2 As shown in FIG. 4, a liquid crystal device was prepared in which a color filter was formed on the outer surface of a liquid crystal cell and a pair of polarizing plates were arranged outside the color filter. The liquid crystal device of this example was placed on an overhead projector and used. In this case, parallax does not occur even if the distance between the transparent electrode and the color filter is large, so there is no problem in forming the color filter on the outer surface of the liquid crystal cell.

【0010】<実施例3>基板として透明電極の形成さ
れたプラスチック板を用いた液晶セルに、実施例2と同
様な、液晶セルの外側にカラーフィルターを配置した液
晶装置を作成した。本実施例は、基板が薄いため視差が
少なく、直視型でも良好なマルチカラー表示が行えた。
Example 3 A liquid crystal device using a plastic plate on which transparent electrodes were formed as a substrate and having a color filter arranged outside the liquid crystal cell was prepared in the same manner as in Example 2. In the present embodiment, since the substrate is thin, parallax is small, and good multi-color display can be performed even in the direct-view type.

【0011】<実施例4>実施例3に於て、基板のプラ
スチック板を予め染色し、カラーフィルターを兼ねるよ
うに構成された液晶セルを作成した。本実施例も、良好
なマルチカラー表示を実現した。
<Example 4> In Example 3, a plastic plate as a substrate was dyed in advance to prepare a liquid crystal cell which also functions as a color filter. This example also realized a good multi-color display.

【0012】[0012]

【発明の効果】以上説明した様に本発明によれば、構造
の簡単なSTN方式において複数の色を安定して表示す
ることが可能となり、安価なカラー液晶装置を提供する
ことが可能である。尚、実施例1で、本発明のカラーフ
ィルターの配置位置は、透明電極上のみならず、例えば
透明電極パターンを横切るようにどこに配置されても良
い。また、カラーフィルターの種類、色は、それぞれの
要求により選択可能であり、様々なマルチカラー表示が
できる。
As described above, according to the present invention, it is possible to stably display a plurality of colors in the STN method having a simple structure, and it is possible to provide an inexpensive color liquid crystal device. .. In the first embodiment, the color filter of the present invention may be arranged not only on the transparent electrode but also anywhere, for example, across the transparent electrode pattern. Further, the type and color of the color filter can be selected according to each request, and various multi-color display can be performed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明のマルチカラー液晶装置の分光特性の一
例を示す図。
FIG. 1 is a diagram showing an example of spectral characteristics of a multi-color liquid crystal device of the present invention.

【図2】STNブルーネガモードの分光特性をしめす
図。
FIG. 2 is a diagram showing the spectral characteristics of STN blue negative mode.

【図3】本発明のマルチカラー液晶装置の断面図。FIG. 3 is a sectional view of a multi-color liquid crystal device of the present invention.

【図4】本発明のマルチカラー液晶装置の断面図。FIG. 4 is a cross-sectional view of a multi-color liquid crystal device of the present invention.

【符号の説明】[Explanation of symbols]

1.非選択時の分光カーブ 2.赤選択時の分光カーブ 3.緑選択時の分光カーブ 4.非選択時の分光カーブ 5.選択時の分光カーブ 6.透明電極 7.カラーフィルターR 8.カラーフィルターG 9.配向膜 10.基板 11.偏光板 12.シール部 1. Spectral curve when not selected 2. Spectral curve when red is selected 3. Spectral curve when green is selected 4. Spectral curve when not selected 5. Spectral curve when selected 6. Transparent electrode 7. Color filter R 8. Color filter G 9. Alignment film 10. Substrate 11. Polarizing plate 12. Seal part

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】対向して配置された一対の電極基板間に1
80度から360度の範囲でねじれ配向したネマチック
液晶を挟持してなる液晶セルと、前記液晶セルの内面ま
たは外面の少なくとも一方にカラーフィルター層を設け
た事を特徴とするマルチカラー液晶装置。
1. A pair of electrode substrates arranged opposite to each other.
A multi-color liquid crystal device comprising a liquid crystal cell sandwiching nematic liquid crystals twisted and aligned in a range of 80 to 360 degrees, and a color filter layer provided on at least one of an inner surface and an outer surface of the liquid crystal cell.
JP4115833A 1992-05-08 1992-05-08 Multicolored liquid crystal display device Pending JPH05313124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4115833A JPH05313124A (en) 1992-05-08 1992-05-08 Multicolored liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4115833A JPH05313124A (en) 1992-05-08 1992-05-08 Multicolored liquid crystal display device

Publications (1)

Publication Number Publication Date
JPH05313124A true JPH05313124A (en) 1993-11-26

Family

ID=14672252

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4115833A Pending JPH05313124A (en) 1992-05-08 1992-05-08 Multicolored liquid crystal display device

Country Status (1)

Country Link
JP (1) JPH05313124A (en)

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