JPS6238427A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To remove luminescent spots due to spacers and to form a liquid crystal display device having high display contrast and reducing the transmissibity of a dark level at the no impression of voltage to the device by using dyed fine grains having prescribed grain size or opaque fine grains as the spacers holding a gap to be filled with liquid crystal. CONSTITUTION:Optionally patterned transparent electrodes 23, 24 and orientation films 25 are formed on the surfaces of a pair of transparent base boards 21, 22 of which sides are contacted with liquid crystal. Then, dyed fine grains having the prescribed grain size or opaque fine grains 26 are scattered into the gap between both the base boards of which orientation has bee processed as the spacers holding the gap at a fixed interval, the peripheral parts of the gap are sealed to assemble a cell and the gap part is filled with a liquid crystal material 28 to form a liquid crystal display device. The liquid crystal display device obtained by said procedure can reduce its transmissibity at the no impression of voltage by several ten % as compared with a conventional liquid crystal display device and high display contrast can be obtained.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、高性能、高歩留りの液晶表示装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high performance, high yield liquid crystal display device.

従来の技術 １　　近年、液晶表示装置は特に画像表示に代表される
大容量表示の研究が活発であり、低価格デー（イスが実
現出来るｆイスプレイとして注目されている。BACKGROUND ART 1 In recent years, research has been active in liquid crystal display devices, particularly in large-capacity displays such as image displays, and they are attracting attention as f-displays that can be realized in low-cost displays.

以下図面を参照しながら、前述した従来の液晶表示装置
の一例について説明する。An example of the conventional liquid crystal display device mentioned above will be described below with reference to the drawings.

第２図、第３図は従来の液晶表示装置の一例で、マ）　
ＩＪクス型液晶表示装置の構成を示す部分断面図及び平
面図である。Figures 2 and 3 are examples of conventional liquid crystal display devices.
1 is a partial cross-sectional view and a plan view showing the configuration of an IJ square type liquid crystal display device.

一対の透明な基板１，２の液晶と接する面に、それぞれ
帯状に分割した電極群３，４と配向膜６を形成し、ガラ
スファイバー或いは樹脂微粒子全散布しスペーサー８を
設け、電極群３，４が互いに直交する様に対向させて貼
り合わせスペーサーにより形成された間隙に液晶材料７
を充填し、両基板の外側に直線偏光板８，９を貼９合わ
せたものであり、以上の様に構成された液晶表示装置は
、分割されたそれぞれの電極群３，４の各交差点が絵素
１０を形成し、これらの電極群に選択的に電圧を印加す
ることにより、任意の情報全表示する事が出来る。Electrode groups 3 and 4 divided into strips and an alignment film 6 are formed on the surfaces of a pair of transparent substrates 1 and 2 that are in contact with the liquid crystal, and glass fibers or fine resin particles are all scattered and spacers 8 are provided. The liquid crystal material 7 is placed in the gap formed by the spacer, which is pasted together so that the liquid crystal materials 7 and 4 face each other perpendicularly.
In the liquid crystal display device constructed as described above, each intersection of the divided electrode groups 3 and 4 is By forming picture elements 10 and selectively applying voltage to these electrode groups, any information can be displayed in its entirety.

発明が解決しようとする問題点 しかしながら前記の様な構成では、特に電圧派印加状態
で暗レベルを示すネガ表示の場合、通常電圧無印加状態
での暗レベルの透過率は出来るだけ低い方が望ましいが
、無色のスペーサーを用いているのでその液晶のないス
ペーサ一部分が輝点として現われ、その分たけ透過率が
上がってしまい、表示コントラストに大変な悪影響を与
える。Problems to be Solved by the Invention However, with the above configuration, especially in the case of a negative display that shows a dark level when a voltage is applied, it is desirable that the transmittance of the dark level when no voltage is applied is as low as possible. However, since a colorless spacer is used, the part of the spacer where there is no liquid crystal appears as a bright spot, and the transmittance increases accordingly, which has a very negative effect on display contrast.

輝点を避ける為、スペーサーを用いないで液晶表示装置
を構成すると今度は両基板間の間隙を均一に作つ事が困
難になシ、色むら等表示品位を低下させてしまう。また
出来るたけ輝点を少なくし、しかも両基板間の間隙を均
一に保てる様な必要最小限のファイバー形成条件も、少
しの誤差で表示特性が変わってしまい、安定性１歩留り
或は作業効率の大幅な低下となる。If a liquid crystal display device is constructed without using a spacer in order to avoid bright spots, it will be difficult to create a uniform gap between both substrates, resulting in poor display quality such as color unevenness. Furthermore, even with the minimum necessary fiber forming conditions such as minimizing bright spots and maintaining a uniform gap between both substrates, even the slightest error will change the display characteristics, resulting in a loss of stability, yield, or work efficiency. This is a significant decrease.

本発明は前記問題点に鑑み、スペーサーによる輝点を除
去し、液晶表示装置が電圧無印加の状態での暗レベルの
透過率の低い、表示コントラストの優れた液晶表示装置
を提供するものである。In view of the above-mentioned problems, the present invention provides a liquid crystal display device which eliminates bright spots caused by spacers, has low dark level transmittance when no voltage is applied to the liquid crystal display device, and has excellent display contrast. .

問題点を解決するための手段 前記問題点を解決する為に本発明の液晶表示装置は、液
晶材料を充填する間隙を保つ為のスペーサーとして、染
色された色つきの所定径を有する微粒子又は不透明微粒
子を用いるものである。Means for Solving the Problems In order to solve the above-mentioned problems, the liquid crystal display device of the present invention uses dyed colored fine particles or opaque fine particles having a predetermined diameter as a spacer for maintaining the gap filled with the liquid crystal material. is used.

作用 本発明は前記した構成によって電圧無印加状態で暗レベ
ルを示すネガ表示の場合に、従来は輝点となり透過率を
上げ表示コントラストに悪影響を与えていたスペーサー
が染色されている為、或は不透明である為透過率を上げ
る事なくしかも基板間の間隙を均一に医つ事の出来る表
示品位の良い液晶表示装置を得ることとなる。Effect of the present invention With the above-described configuration, in the case of a negative display showing a dark level in a state where no voltage is applied, the spacer, which conventionally became a bright spot and increased the transmittance and adversely affected the display contrast, is dyed. Since it is opaque, it is possible to obtain a liquid crystal display device with good display quality that can uniformly fill the gap between the substrates without increasing the transmittance.

実施例 以下本発明の一実施例の液晶表示装置について図面を参
照しながら説明する。EXAMPLE Hereinafter, a liquid crystal display device according to an example of the present invention will be described with reference to the drawings.

第１図において、一対の透明な基板２１．２２の液晶と
接する面側に任意の形状にパタ／ニングされた透明電極
群２３．２４と配向膜２６を設ける。次に配向処理され
た両基板２１．２２の間隙と一定に保つ為のスペーサー
として、染色された所定径を有する微粒子又は不透明微
粒子２６を散布し周辺部をシール２７し貼り合わせてセ
ルを組立て液晶材料２８を充填し液晶表示装置とする。In FIG. 1, transparent electrode groups 23, 24 and an alignment film 26, which are patterned into an arbitrary shape, are provided on the sides of a pair of transparent substrates 21, 22 that are in contact with the liquid crystal. Next, dyed fine particles or opaque fine particles 26 having a predetermined diameter are sprinkled as a spacer to maintain a constant gap between the two substrates 21 and 22 which have been subjected to alignment treatment, and the periphery is sealed 27 and bonded together to assemble the cell and liquid crystal. The material 28 is filled to form a liquid crystal display device.

この様にして得られた液晶表示装置は従来のものと比較
し電圧無印加状態での透過率が十数％低くなり良好な表
示コントラストを得ることが出来た。The liquid crystal display device thus obtained had a transmittance lower than that of the conventional device by more than ten percent when no voltage was applied, and was able to obtain good display contrast.

尚、第１図における２９．３０は各々上下偏光板である
。Note that 29 and 30 in FIG. 1 are upper and lower polarizing plates, respectively.

発明の効果 本発明は液晶表示装置の液晶を充填する為の間隙を保つ
スペーサーとして染色された所定径を有する微粒子或は
不透明微粒子を使用した為、液晶表示装置が電圧無印加
の状態での暗レベルの時の透過率が低く、表示コントラ
ストの優れた液晶表示装置を得られる上、輝点を避ける
為に行なっていた精密なスペーサー形成条件の確立に係
わる業務や表示品位からなる歩留りの悪化等の作業効率
やコスト面等の問題に関しても大幅に改善することが出
来る。Effects of the Invention The present invention uses dyed fine particles having a predetermined diameter or opaque fine particles as a spacer to maintain a gap for filling the liquid crystal of a liquid crystal display device, so that the liquid crystal display device can remain dark even when no voltage is applied. In addition to being able to obtain a liquid crystal display device with low transmittance at the level and excellent display contrast, the work involved in establishing precise spacer formation conditions to avoid bright spots and the deterioration of yield due to display quality, etc. Problems such as work efficiency and cost can also be significantly improved.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例の液晶表示装置の構成断面図
、第２図、第３図は従来の液晶表示装置の構成図である
。 ２１．２２・・・・・・透明基板、２３．２４・・・・
・・透明電極群、２５・・・・・・配向膜、２６・・・
・・・染色（不透明）微粒子、２７・・・・・・シール
、２８・・・・・・液晶材料、２９゜３ｏ・・・・・・
偏光板。 代理人の氏名　弁理士　中　尾　敏　男　ほか１名２１
．２２−−一透朗基板 ２３．２４−一透明霊糧群 ２５−　　配向膜 ２６−　　染色不透朋微粒子 ２７−　　シール ２８−　　液晶材料 ２ワ、３０−−一　偏光増え 第１図 第２図 第３図FIG. 1 is a cross-sectional view of a liquid crystal display device according to an embodiment of the present invention, and FIGS. 2 and 3 are structural views of a conventional liquid crystal display device. 21.22...Transparent substrate, 23.24...
...Transparent electrode group, 25...Alignment film, 26...
...Dyed (opaque) fine particles, 27...Seal, 28...Liquid crystal material, 29°3o...
Polarizer. Name of agent: Patent attorney Toshio Nakao and 1 other person21
．． 22--Ichitoro substrate 23. 24-Itransparent spiritual food group 25-Alignment film 26-Impervious to dyeing fine particles 27-Seal 28-Liquid crystal material 2W, 30--I Increase in polarization Figure 1 Figure 2 Figure 3

Claims (1)

【特許請求の範囲】[Claims] 少なくとも一方は透明である一対の電極付き基板の電極
面側が互いに向かい合って所定の間隙を保ち、前記基板
の周辺部を接着剤でシールし、前記基板の間隙に液晶を
充填してなる液晶表示装置であり、前記基板間を所定の
間隙に保つスペーサーとして、染色された色つきの所定
径を有する微粒子又は不透明微粒子を使用することを特
徴とする液晶表示装置。A liquid crystal display device comprising a pair of substrates with electrodes, at least one of which is transparent, with the electrode surfaces facing each other with a predetermined gap maintained, the periphery of the substrates being sealed with an adhesive, and the gap between the substrates being filled with liquid crystal. A liquid crystal display device, characterized in that dyed colored fine particles or opaque fine particles having a predetermined diameter are used as spacers for maintaining a predetermined gap between the substrates.