JPH06331970A - Ferroelectric liquid crystal display cell - Google Patents

Ferroelectric liquid crystal display cell

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Publication number
JPH06331970A
JPH06331970A JP12433293A JP12433293A JPH06331970A JP H06331970 A JPH06331970 A JP H06331970A JP 12433293 A JP12433293 A JP 12433293A JP 12433293 A JP12433293 A JP 12433293A JP H06331970 A JPH06331970 A JP H06331970A
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Japan
Prior art keywords
liquid crystal
cell
crystal display
substrate
ferroelectric liquid
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JP12433293A
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Japanese (ja)
Inventor
Kazuhiro Inoue
Hideyuki Nonaka
Kazuto Noritake
Yuji Okita
Eiji Tamaoka
和弘 井上
和人 則武
英二 玉岡
雄二 置田
英幸 野中
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Sanyo Electric Co Ltd
三洋電機株式会社
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Priority to JP12433293A priority Critical patent/JPH06331970A/en
Publication of JPH06331970A publication Critical patent/JPH06331970A/en
Application status is Pending legal-status Critical

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Abstract

PURPOSE: To improve the precision of cell interval control and improve the strength of the liquid crystal cell to a shock by forming a projection body 1 which has an adhesion layer on a substrate for performing high-precision cell interval control over the entire cell.
CONSTITUTION: The projection body 1 is formed between transparent electrodes 5 on the substrate 2 and an insulating film 12 and further an orienting film 6 are formed on the projection body 1. On the other glass substrate, an insulating film 12 and a facing orienting film 4 are formed. Then the orienting film 6 and the facing orienting film 4 are rubbed in parallel. After the other substrate 3 is coated with a seal agent 9, the projection body 1 on one substrate 2 is coated with the adhesion layer 11 and both the substrates are stuck together. Then liquid crystal 8 shows a smectic phase at room temperature, but is made to be in an isotropic liquid state when heated and injected into a cell for liquid crystal injection. Consequently, the structure which has no spacer causes no diffraction phenomenon around a spacer, so a display becomes more uniform.
COPYRIGHT: (C)1994,JPO

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、高速応答性、メモリー性を有する強誘電性液晶を用いた液晶表示セルの構造および作製方法に関する。 The present invention relates to a high-speed response, to a structure and a manufacturing method of a liquid crystal display cell using a ferroelectric liquid crystal having a memory characteristic.

【0002】 [0002]

【従来の技術】強誘電性液晶は応答速度が極めて速く、 BACKGROUND OF THE INVENTION ferroelectric liquid crystal is extremely fast response speed,
又、配向の双安定性を有することに起因して電界を取り去った後にもメモリー性を有するため、高速な表示用の光学変調素子としての応用が期待され、研究開発が盛んに行われている。 Moreover, since having the memory property even after removal of the electric field due to having bistability alignment, application as an optical modulation device for high-speed display is expected, research and development have been extensively conducted .

【0003】ところが、強誘電性液晶の高速応答性、および配向の双安定性が有効に実現されうる為には、従来の液晶表示装置に比べ非常に小さなセル間隔、1.5〜 [0003] However, high-speed response of the ferroelectric liquid crystal, and in order to bistability of alignment can be effectively realized, very small cell gap compared with the conventional liquid crystal display device, 1.5
2μm程度が望まれており、製造上の困難な技術になっている。 About 2μm has been desired, which is a difficult technique in manufacturing. 又衝撃に弱いという欠点を有している。 Further it has the disadvantage that vulnerable to impact.

【0004】従来の強誘電性液晶を用いた液晶表示セルの構造、および作製方法を以下に示す。 [0004] structure of the liquid crystal display cell using the conventional ferroelectric liquid crystal, and a manufacturing method described below.

【0005】通常、空の液晶表示セルの製造工程は、I [0005] Typically, the manufacturing process of an empty liquid crystal display cell of, I
TO透明電極付きガラス基板上に、絶縁膜と配向膜を設け、ラビングにより配向処理を施した後、セル間隔を確保するため一方の基板上に球状または円筒状のスペーサを散布し、エッジシールにより両基板の貼り合わせる順序で行われる。 The TO transparent electrode on a glass substrate, an insulating film and an alignment film provided, after being subjected to orientation treatment by rubbing, spraying a spherical or cylindrical spacers on the substrate one to ensure the cell spacing, the edge seal It is performed in order to bond the two substrates.

【0006】空の液晶表示セル内への強誘電性液晶の注入は、加熱により等方性液体状態にして行われる。 [0006] Ferroelectric liquid crystal injection into the empty liquid crystal display cell is performed by an isotropic liquid state by heating.

【0007】セル内の等方性液体はその後徐冷され、二種類の双極子が混在したカイラルスメクティック液晶状態で封口剤により外部雰囲気から遮断される。 [0007] isotropic liquid in the cell is then gradually cooled, is cut off from the outside atmosphere by a sealing agent in a chiral smectic liquid crystal of two respective dipoles are mixed.

【0008】該作製方法により作製された強誘電性液晶表示セルは、移動しうるスペーサのみによりセル間隔の制御を行うため、セル間隔がスペーサの密度に依存して変化する傾向が見られる(特開昭63−81326号公報)。 [0008] Ferroelectric liquid crystal display cell manufactured by the manufactured method the acting is for controlling the cell gap by only spacers can move, tends to cell spacing changes depending on the density of the spacers can be seen (especially HirakiAkira 63-81326 JP).

【0009】言い換えれば、極めて狭いセルにおいて液晶表示セル全体にわたってスペーサを均一に分散させることが難しいためにセル間隔を精度よく制御するのは困難である。 [0009] In other words, it is difficult to accurately control the cell gap due to the difficult to uniformly disperse the spacers throughout the entire liquid crystal display cell in a very narrow cell.

【0010】本発明者らが1.5μmのスペーサを用いて該作製方法により作製した液晶表示セルについてセル間隔測定を行った結果、同一セル内で1.24〜1.6 [0010] The present inventors have results of the cell gap measuring liquid crystal display cell prepared by the acting manufactured method using the spacer of 1.5 [mu] m, in the same cell from 1.24 to 1.6
4μmのばらつき、言い換えるとセルの厚さの標準偏差と平均値との百分率が11%もあり、スペーサ密度の小さい場所においてセル間隔が小さくなることが確認された。 Variation of 4 [mu] m, there is also a percentage of 11% of the thickness of the average value as the standard deviation of the cell in other words, cell spacing in small places spacer density that decreases were confirmed.

【0011】即ち、散布されたスペーサのみにより、セル全領域に於てセル間隔を精度よく均一に制御するのは困難であるといえる。 [0011] That is, only by spacers sprayed, it can be said that it is difficult to accurately and uniformly control the cell gap At a cell all areas.

【0012】そこで、基板に突起体を備えて液晶注入用セル間隔の均一化を図った構造が提案されている(特公平2−36930号公報)。 [0012] Therefore, structures made uniform in the liquid crystal injection cell gap provided with a protrusion on the substrate has been proposed (KOKOKU 2-36930 Patent Publication).

【0013】図7は一対の平行基板間に突起体のみを備えた従来の強誘電性液晶表示セルの断面図である。 [0013] FIG. 7 is a sectional view of a conventional ferroelectric liquid crystal display cell having only projections between a pair of parallel substrates.

【0014】図7において、一方の基板2上には突起体1と一方の電極5が形成されており、各々は配向膜6で覆われている。 [0014] In FIG. 7, is on one of the substrates 2 are formed one electrode 5 and the protrusions 1, each of which is covered with an alignment film 6.

【0015】配向膜6に覆われた突起体1の一端は一方の基板上にあり、突起体の他端は対向配向膜4と接している。 [0015] One end of the protrusion 1 covered with the alignment film is in one of the substrates, the other end of the protrusion is in contact with opposed orientation films 4.

【0016】そして、他方の基板3上には一方の基板2 [0016] Then, on the other substrate 3 is one of the substrates 2
上の一方の電極と直交する他方の電極7が形成され、対向配向膜4で覆われている。 The other electrode 7 which is perpendicular to the one electrode of the upper is formed, is covered with opposed orientation films 4.

【0017】一方の基板2上の対向配向膜4と他方の基板3上の配向膜6との間に液晶8が注入され、シール剤9により封入される。 [0017] the liquid crystal 8 is injected between the alignment film on the counter alignment layer 4 and the other substrate 3 on one substrate 2, it is sealed by a sealing agent 9.

【0018】液晶の厚さは通常スペーサ10により規定されるが、図7のように突起体1を備えると液晶注入用セルの間隔は均一化される。 The liquid crystal thickness is defined by typically a spacer 10, spacing in the liquid crystal injection cell when provided with a protrusion 1 as shown in FIG. 7 is uniform.

【0019】ところが、該作製方法により作製された強誘電性液晶表示セルは、衝撃への特別な対策を有しない。 [0019] However, ferroelectric liquid crystal display cells that are produced by the acting made method has no special measures to shock.

【0020】実際本発明者らは、該液晶表示セルの両側に偏光子を取り付ける際、強誘電性液晶の配向に一部乱れが生じることを確認した。 [0020] Indeed the present inventors have found that when mounting the polarizer on both sides of the liquid crystal display cell, it was confirmed that some turbulence may occur in the alignment of the ferroelectric liquid crystal. 即ち、該作製方法により作製された強誘電性液晶表示セルは、平行基板が固定されていないために衝撃でセル間隔が一時的に変化し配向が乱れるものと思われ、外部からの機械的衝撃に対する十分なセル強度を有していないといえる。 That is, the ferroelectric liquid crystal display cell produced by the acting made the method, the cell gap at the impact is believed to temporarily change orientation is disturbed because the parallel substrate not fixed, mechanical impact from the outside it can be said that does not have a sufficient cell strength against.

【0021】そのため、一対の平行基板間に接着層を備えて液晶表示セル間隔の均一化及び耐衝撃性の向上を図った構造も提案されている(特開昭62−96925号公報)。 [0021] Therefore, even structures with improved uniform and impact resistance of the adhesive layer of the liquid crystal display cell gap provided between a pair of parallel substrates has been proposed (JP 62-96925 JP).

【0022】図8は一対の平行基板間にスペーサと接着層を備えた従来の強誘電性液晶表示セルの断面図である。 [0022] FIG. 8 is a sectional view of a conventional ferroelectric liquid crystal display cell having a spacer and an adhesive layer between a pair of parallel substrates.

【0023】図8において、ゴム系レジストで形成された接着層11は一方の基板2上の配向膜6と、他方の基板上の対向配向膜4との間に点在し、両者を互いに接着している。 [0023] In FIG. 8, the alignment film on the adhesive layer 11 is one of the substrates 2 made of a rubber-based resist, interspersed between the counter alignment layer 4 on the other substrate, both mutually adhesive doing.

【0024】図8のように一対の平行基板をスペーサでセル間隔を制御し、接着層により固定すると、液晶注入後に衝撃により配向が乱れることは無くなるが、強誘電性液晶表示セルの厚さの標準偏差と平均値との百分率が14%と大きく、均一配向に基づく単一領域(モノドメイン)の形成がされない倶れがあった。 [0024] The pair of parallel substrates to control the cell gap by a spacer as shown in FIG. 8, when fixed by the adhesive layer, no is the after liquid crystal injection oriented by an impact is disturbed, but the ferroelectric liquid crystal display cell thickness of the as large as a standard deviation percentage between the average value is 14%, there was Re 倶 formation is not a single region based on the uniform orientation (monodomain).

【0025】 [0025]

【発明が解決しようとする課題】本発明は、上述の従来の欠点に鑑みてなされたものであり、セル間隔制御の精度の向上と衝撃に対する液晶セル強度の向上を目的としてなされたものである。 The present invention is to challenge it to solve] has been made in view of the conventional drawbacks described above has been made in order to improve the liquid crystal cell intensity for improved accuracy and impact of the cell interval control .

【0026】 [0026]

【課題を解決するための手段】本発明に於ては、セル全体にわたって高精度のセル間隔制御を行うために、一基板上に突起体を形成した。 Te is at the present invention SUMMARY OF THE INVENTION In order to perform highly accurate cell interval control over the entire cell, to form a protrusion on one substrate.

【0027】また、機械的衝撃に対するセル強度の向上のために突起体上に接着層を形成して両基板を固定した。 Further, fixing the two substrates to form an adhesive layer on the protrusion in order to improve the cell strength against mechanical impact.

【0028】 [0028]

【作用】本発明のセル間隔は突起体で規制されるために通常のスペーサを用いたセルに比べスペーサを用いたセルに比べスペーサ密度の不均一に基づくセル間隔のバラツキが無くなるためにセル間隔が高精度に制御される。 [Action] cell spacing in the present invention is usually a cell interval to the variation of unevenly-based cell spacing is eliminated spacer density compared to cells using the spacers as compared to the cell using a spacer to be restricted by the protrusion There are precisely controlled.

【0029】又、突起体上の薄い接着層は両基板を固定するので機械的衝撃によるセル間隔の変化を防ぐことができ、強誘電性液晶表示セルの耐衝撃性が向上する。 [0029] Further, a thin adhesive layer on the protrusion is so secure the two substrates can be prevented the variation of the cell gap due to mechanical shock, impact resistance of the ferroelectric liquid crystal display cell is improved.

【0030】更に接着層が薄く、接着面積が広いので、 [0030] thinly further adhesive layer, since there is a wide adhesion area,
突起体上の接着層がセル間隔で離れた二枚の基板を強固に固定する。 Adhesive layer on the protrusion is firmly fix the two substrates apart at cell spacing.

【0031】 [0031]

【実施例】以下に本発明の実施例を図に従って説明する。 EXAMPLES be described with reference to FIG embodiments of the present invention are described below.

【0032】図1は、スペーサを無くし、突起体と接着層で構成する本発明の強誘電性液晶表示セルの断面図を示している。 [0032] Figure 1, without a spacer, a cross-sectional view of a ferroelectric liquid crystal display cell of the present invention be composed of protrusions and the adhesive layer.

【0033】図1では帯状の突起体1がガラス製の一方の基板2上の透明なITO製の一方の電極5間に形成される。 [0033] Figure strip of protrusions 1, 1 is formed between the 5 one electrode made of transparent ITO on one substrate 2 made of glass.

【0034】この突起体1を形成する材料としては、ポリイミド、ポリビニルアルコール、ポリエステル、ポリ塩化ビニル、アクリル樹脂、感光性ポリイミド、感光性ポリアミドなどが考えられる。 [0034] As a material for forming the protrusions 1, polyimide, polyvinyl alcohol, polyester, polyvinyl chloride, acrylic resin, photosensitive polyimide, a photosensitive polyamide is considered.

【0035】突起体の形成後、突起体上に絶縁膜12さらに配向膜6が形成される。 [0035] After the formation of the protrusions, the insulating film 12 further alignment film is formed on the protrusions.

【0036】他方のガラス基板上には、絶縁膜12、対向配向膜4が形成される。 [0036] On the other glass substrate, the insulating film 12, the opposing orientation films 4 are formed.

【0037】絶縁膜にはSiO 2 、シリコン窒化物、シリコン炭化物など、さらに配向膜には突起体材料に示した材料などを用いることができる。 [0037] SiO 2, silicon nitride for the insulating film, such as silicon carbide, and more oriented film or the like can be used materials described in the protrusion material.

【0038】絶縁膜12は厚さ400Åから2000Å The insulating film 12 is 2000Å a thickness of 400Å
までのITO製の一方の電極または他方の電極を覆って、絶縁膜上にさらに堆積される配向膜の表面の平坦性を高めると共にITO製の透明電極の抵抗値が有機製の配向膜との接触により増大することを抑える働きをする。 Covering the one electrode or the other electrode made of ITO to the resistance value of the ITO-made transparent electrode to increase the flatness of the surface of the alignment film is further deposited on the insulating film is an alignment film made of organic and it serves to reduce that increase by contact.

【0039】配向膜6及び対向配向膜4に対して、帯状の突起体の延長方向に一軸性配向方向と液晶注入方向が平行(パラレル)となるパラレルラビング(特開昭62 The alignment film and the counter oriented to the membrane 4, the parallel rubbing uniaxial orientation direction and the liquid crystal injecting direction in the extending direction of the band-shaped protrusions are parallel (parallel) (JP 62
−247326号公報)を行う。 -247,326 JP) is performed.

【0040】一軸性配向方向と液晶注入方向が垂直(アンチパラレル)となるアンチパラレルラビングを行った方がパラレルラビングよりコントラストは高くなる一方、駆動電圧は低くなるとの報告(特開昭62−247 [0040] While the Write uniaxial orientation direction and the liquid crystal injection direction was antiparallel rubbing the vertical (anti-parallel) is made of the contrast is high parallel rubbing, the driving voltage reported to be lower (JP 62-247
327号公報)もあるので、セルの必要特性に応じてラビング方向は決定される。 Since 327 JP) also, the rubbing direction in accordance with the required characteristics of the cell are determined.

【0041】突起体を有しない他方の基板3上に厚さ0.2mmのシール剤9を塗布後、両基板接着のため、 [0041] After applying the sealing agent 9 having a thickness of 0.2mm on the other substrate 3 having no protrusions, for both substrate bond,
一方の基板2の突起体1上に厚さ800Åの接着層11 Adhesive layer 11 having a thickness of 800Å on projections 1 of one substrate 2
が塗布され、両基板が貼り合わされる。 There are applied, both substrates are bonded to each other.

【0042】液晶8は常温ではスメクティック相を示すが、加熱により等方性液体状態に於て液晶注入用セルへの注入が行われる。 [0042] The liquid crystal 8 shows a smectic phase at room temperature, the injection of the isotropic liquid state Te at the liquid crystal injection cell is performed by heating.

【0043】注入後、強誘電性液晶表示セルを徐冷し偏光板を備えることによりモノドメイン強誘電性液晶表示素子が形成される。 [0043] After injection, the monodomain ferroelectric liquid crystal display element by slowly cooling the ferroelectric liquid crystal display cell comprising a polarizing plate is formed.

【0044】このような構成により、液晶層の厚さを1.9μmから2.1μmに収めることができた。 [0044] With such a configuration, it could be accommodated in 2.1μm thickness of the liquid crystal layer from the 1.9 .mu.m.

【0045】図1のように強誘電性液晶表示セル内に一切フィラー製のスペーサを持たない構造はスペーサの回りの回折現象が無いので表示がより均等になる。 The structure having no filler made of spacers all to the ferroelectric liquid crystal display cell as shown in FIG. 1 is shown because there is no rotation of the diffraction of the spacer becomes more uniform.

【0046】図2は、スペーサの少なくし、突起体と接着層で構成する本発明の強誘電性液晶表示セルの断面図を示している。 [0046] Figure 2 is a reduced spacer shows a cross-sectional view of a ferroelectric liquid crystal display cell of the present invention be composed of protrusions and the adhesive layer.

【0047】図2では帯状の突起体1がガラス製の一方の基板2上の透明なITO製の一方の電極5間及びエッジシール部に形成される。 [0047] Figure 2 the belt-shaped protrusions 1 is formed between the one electrode 5 made of transparent ITO on one substrate 2 made of glass and the edge seal portion.

【0048】強誘電性液晶表示装置の周辺部は主として有効表示部となる中央部に比べて電極数が少ないことが有るので、スペーサ10を他方の基板3上の対向配向膜4上に散布することは観測される無効表示部のセル間隔を一定を保ち、均一な背景の形成に役立つ。 [0048] Since the strength perimeter of the ferroelectric liquid crystal display device, it is there the number electrode is smaller than the central portion composed mainly effective display portion, spraying spacers 10 on the counter alignment layer 4 on the other substrate 3 it keeps the constant cell spacing in the invalid display portion observed, it helps form a uniform background.

【0049】また、図2のようにエッジシール部に硬くて厚い突起部1と柔らかく薄い接着層11を配置することで位置によるセル間隔の標準偏差と平均値との百分率が4%と格段に小さくなる。 [0049] Also, remarkably the percentage of 4% and the average value and the standard deviation of the cell spacing by position by placing the projecting portions 1 a soft thin adhesive layer 11 thick hard and the edge seal portion as shown in FIG. 2 smaller.

【0050】次に、本発明の突起体の形成方法とその効果について詳しく述べる。 Next, he described in detail the method of forming the protrusions of the present invention and its effects.

【0051】図3は帯状の突起体を設けた本発明の強誘電性液晶表示セルの平面図である。 [0051] FIG. 3 is a plan view of a ferroelectric liquid crystal display cell of the present invention provided with strip-shaped protrusions.

【0052】突起体1は感光製ポリイミド(東レ製UR [0052] protrusions 1 a photosensitive made of polyimide (manufactured by Toray Industries, Inc. UR
−3800)を材料として露光及び現像工程を伴う光加工(以下フォトリソと称する)を用いて複数の電極間にとびとびにフォトリソ形成される。 It is photolithography formed at intervals between a plurality of electrodes using an optical processing involving exposure and development processes to -3800) as the material (hereinafter referred to as photolithography).

【0053】ここでは一方の電極方向と平行に高さ1. [0053] Here high in parallel with one of the electrodes direction of 1.
5μm、幅8μm、ピッチ100μmの帯状の突起体1 5 [mu] m, a width 8 [mu] m, the protrusion 1 of the band-shaped pitch 100μm
の形成を行っている。 It is carried out of the formation.

【0054】帯状の突起体形成後、SiO 2をターゲットとしてスパッタリングにより、厚さ0.8μmの絶縁膜の形成を行った。 [0054] After band-shaped protrusions formed by sputtering a SiO 2 as a target, was formed with a thickness of 0.8μm of the insulating film.

【0055】その後、ポリイミド材料(東レ製SP−7 [0055] After that, a polyimide material (manufactured by Toray Industries, Inc. SP-7
10)のスピンコートにより配向膜を形成した。 An alignment film was formed by spin coating of 10).

【0056】ラビングは強誘電性液晶表示セルの液晶の注入方向13となる帯状の突起体の延長方向に行い、パラレルラビング(平行ラビング)とした。 [0056] Rubbing is performed in the extending direction of the strip-shaped protrusions as the injection direction 13 of the liquid crystal of the ferroelectric liquid crystal display cell, and a parallel rubbing (parallel rubbing).

【0057】次に、突起体を有しない他方の基板3上に他方の電極及び対向配向膜を積層し、その後、一方の基板2上の突起体上に熱硬化型樹脂(三井製XN−21− Next, the other electrode and the opposing orientation films on no other substrate 3 a projection member are laminated, then, thermosetting resin on a protrusion on one of the substrates 2 (Mitsui XN-21 -
F)、エッジシール部に二液性エポキシ樹脂をそれぞれ印刷塗布し、加熱による両基板の接着を行った。 F), the edge seal portion of two-component epoxy resin applied by printing, respectively, were adhered on both substrates by heating.

【0058】その結果、通常散布されるスペーサが無いにも係わらず、セルの厚さの標準偏差と平均値との百分率が2%と非常に小さくなった。 [0058] As a result, normal despite no spacer is sprayed, the percentage of the thickness average value standard deviation of the cell becomes very small and 2%.

【0059】また、柱状の突起体により強誘電性液晶表示セルを複数の領域に分割することにより、非表示部分の液晶注入体積が減少すると共に注入時の液晶の移動方向がほぼ注入方向に限定される結果、液晶の注入速度が早くなる長所が生じる。 [0059] In addition, limited by dividing the ferroelectric liquid crystal display cell by the columnar protrusion into a plurality of regions, approximately infusion movement direction of the liquid crystal when injected together with a liquid crystal injection volume of the non-display area is reduced is the results in the advantage that the injection speed of the liquid crystal is accelerated.

【0060】図4に島状の突起体を設けた本発明の強誘電性液晶表示セルの平面図を示す。 [0060] shows a plan view of a ferroelectric liquid crystal display cell of the present invention provided with island-shaped protrusions in Fig.

【0061】突起体1は感光製ポリイミド(東レ製UR [0061] protrusions 1 a photosensitive made of polyimide (manufactured by Toray Industries, Inc. UR
−3800)を用いて複数の電極間にとびとびにフォトリソ形成される。 It is photolithography formed at intervals between a plurality of electrodes using a -3800).

【0062】次に、突起体を有しない他方の基板3上に1.5μmのスペーサを散布し、その後、一方の基板2上の突起体及びエッジシール部上に熱硬化型樹脂(三井製XN−21−F)を印刷塗布し、加熱による両基板の接着を行い、液晶を一方の基板2上の一方の電極に平行な注入方向13から注入して強誘電性液晶表示セルが構成される。 Next, sprayed spacers 1.5μm on no other substrate 3 a projection member, then, protrusions on one of the substrates 2 and the edge seal portion on the thermosetting resin (manufactured by Mitsui XN -21-F) was printed and applied, performs bonding of the substrates by heating, injected into a ferroelectric liquid crystal display cell is composed of parallel injection direction 13 to one electrode of one of the substrates 2 to the liquid crystal .

【0063】この場合、高さ1.5μm、縦横8μmの寸法で、一方の電極の延在方向と垂直にピッチを変えた島状の突起体1の形成を行っている。 [0063] is performed in this case, the height 1.5 [mu] m, in height and width 8 [mu] m, the formation of one extending direction changed pitch vertically island-like projections of the electrode 1.

【0064】その結果、セルの厚さの標準偏差と平均値との百分率が4%と非常に小さくなった。 [0064] As a result, the percentage of the standard deviation and the average value of the thickness of the cell becomes very small and 4%.

【0065】また、島状の突起体と少量のスペーサを強誘電性液晶表示セルに備える場合、大型セルのように相対的に注入口が小さい場合でもセルの厚さを均一化したまま容易に注入できるという利点がある。 [0065] Also, when having a small amount of spacer and island-like protrusions in the ferroelectric liquid crystal display cell, while easily to equalize the thickness of the cell even if relatively inlet as large cells are small there is an advantage that it can be injected.

【0066】ところで、図4の突起体の液晶の注入方向13に垂直な方向のピッチは強誘電性液晶表示セルの中央部で小さく、周辺部で大きく設定されている。 [0066] Incidentally, smaller in the central portion of the liquid crystal in the direction perpendicular the pitch in the injection direction 13 ferroelectric liquid crystal display cell of the projection of Figure 4 is set to be larger at the peripheral portion.

【0067】ここで、強誘電性液晶表示セルの中心と境界との距離Aは、中央の突起部と中間の突起部との距離D1と、中間の突起部と境界の突起部との距離D2との和で表されるから、本実施例の構成は中央の突起部と中間の突起部との距離D1が、中間の突起部と境界の突起部との距離D2より小さくなっていることを意味する。 [0067] Here, the distance A between the center and the boundary of the ferroelectric liquid crystal display cell, a distance D1 between the center of projection and the middle of the protrusion, the distance between the middle of the projection and the boundary of the protrusion D2 because represented by the sum of the, the structure of this embodiment in which the distance D1 between the center of projection and the middle of the protrusion is smaller than the distance D2 between the intermediate projection and the boundary of the projecting portion means.

【0068】この構造は通常、強誘電性液晶表示セルの中央部が緩慢に放熱するのに対して、周辺部は急速に放熱して強誘電性液晶が複数の領域に別れるのを防止して、強誘電性液晶表示セル内の液晶が液体状態からスメクティック液晶状態へ相転移する冷却速度がセル全面で均一化されるため、セル内の液晶がよりモノドメインになり易いという利点がある。 [0068] This structure is normally whereas the central portion of the ferroelectric liquid crystal display cell is slowly dissipated, periphery to prevent the ferroelectric liquid crystal rapidly dissipated is split into a plurality of regions since the cooling rate of the liquid crystal of the ferroelectric in the liquid crystal display cell is a phase transition from a liquid state to a smectic liquid crystal state is uniform in the cell the entire surface, there is an advantage that tends to the liquid crystal is more monodomain in the cell.

【0069】ここまで、一方の基板だけに突起体を設けた強誘電性液晶表示セルについて記述してきたが、両方に突起体を有しても良い。 [0069] Up to this point, has been described only for ferroelectric liquid crystal display cell provided with a protrusion one of the substrates, both may have a protrusion.

【0070】図5は両側の基板に短冊状の突起体を設けた本発明の強誘電性液晶表示セルの斜視図である。 [0070] FIG. 5 is a perspective view of a ferroelectric liquid crystal display cell of the present invention provided with strip-shaped protrusions on both sides of the substrate.

【0071】図5に示されるように、一方の基板2上に複数の突起体1と突起体を覆う複数の接着層11が設けられると共に、他方の基板3上に一方の基板上の突起体と直交する突起体が形成されている。 [0071] As shown in FIG. 5, a plurality of adhesive layers 11 on one of the substrates 2 with a plurality of protrusions 1 covers the protrusions are provided, the protrusion on one of the substrates on the other substrate 3 projections perpendicular is formed with.

【0072】電極間に、上下の電極で直交する突起体を設ければ、突起体の厚さを半分にすることができるのでラビングにより突起体の一部が欠落することが少なくなるという長所がある。 [0072] between the electrodes, by providing the protrusion perpendicular with upper and lower electrodes, advantages that some projections by rubbing it is possible to halve the thickness of the protrusion that is less that missing is there.

【0073】図6に一方の基板上への接着層の印刷する製造工程図を示す。 [0073] Figure 6 illustrates a manufacturing process diagram for the printing of the adhesive layer to one of the substrates.

【0074】最初にコンベア14上の展色板15に接着剤16を滴下する(図6a)。 [0074] First dripping the adhesive 16 on the conveyor 14 Ueno coatability plate 15 (FIG. 6a).

【0075】続いて、コンベア14上方のブレード17 [0075] Subsequently, the conveyor 14 above the blade 17
はコンベアより高速に動いて、接着剤を展色板16に刷り込む(図6b)。 Is moving faster than the conveyor, imprinted adhesive to exhibition color plate 16 (Figure 6b).

【0076】そして、展色板はコンベア上方のローラー18に巻き込まれる際に接着層11をローラー18上に転写する(図6c)。 [0076] Then, exhibition color plate to transfer the adhesive layer 11 on the roller 18 as it is caught in the conveyor above the rollers 18 (FIG. 6c).

【0077】最後にコンベア上で展色板の後方に配置され、突起体を備えた一方の基板2にローラー18から巻き込まれる際に接着層11が転写印刷される(図6 [0077] disposed behind the last on a conveyor coatability plate, the adhesive layer 11 is transfer printing when being caught from the roller 18 to the substrate 2 while having the protrusions (Fig. 6
d)。 d).

【0078】両基板貼り合わせの後、強誘電性液晶(メルク製ZLI−3488)を加熱により等方相状態で注入し、セル温度を徐冷して強誘電性液晶表示セルを作製した。 [0078] After the two substrates bonded, injected at an isotropic phase state by heating the ferroelectric liquid crystal (Merck ZLI-3488), to prepare a ferroelectric liquid crystal display cell was gradually cooled the cell temperature.

【0079】以上のように作製された二層構造の柱状のスペーサを有する強誘電性液晶表示セルに対して、セル内の15ケ所に於てセル間隔測定をおこなった結果、設定値1.5μmに対して1.46〜1.52μmとなり、通常のセルと比較して高精度のセル間隔制御が得られた。 [0079] For the ferroelectric liquid crystal display cell having a columnar spacers of the fabricated two-layer structure as described above, the result of performed cell gap measuring At a 15 places in the cell, setting value 1.5μm 1.46~1.52μm next, highly accurate cell interval control as compared to normal cells was obtained for.

【0080】また、該強誘電性液晶表示セルの両側に偏光子をクロスニコルの状態で取り付けたが、通常のセルに発生した液晶配向の乱れは見られなかった。 [0080] Moreover, although the polarizer on both sides of the ferroelectric liquid crystal display cell was mounted in a cross nicol state, disturbance of liquid crystal orientation that occur ordinary cell was observed.

【0081】突起体を島状に形成すること以外は前記の実施例と全く同様に強誘電性液晶表示セルの作製を行った。 [0081] except for forming a protrusion on the island We fabricated just as ferroelectric liquid crystal display cell and the embodiment.

【0082】この場合、前記の実施例と同等のセル間隔の精度(1.44〜1.52μm)が得られた。 [0082] In this case, the embodiment of equivalency of the cell gap accuracy (1.44~1.52μm) was obtained. また、 Also,
いずれの実施例においても偏光子取り付けの際に液晶配向の乱れは見られなかった。 Disturbance of liquid crystal orientation when the polarizer attached in any of the examples were not observed.

【0083】 [0083]

【発明の効果】本発明の強誘電性液晶表示セル構造によれば、スペーサとしての機能を有する突起体上への接着剤塗布を行い接着部領域が増加するため、セル間隔の制御を高精度に行うことが可能となる。 According to the ferroelectric liquid crystal display cell structure of the present invention, since the adhesive area performs adhesive application onto the projections having a function as a spacer is increased, high-precision control of the cell spacing it is possible to perform in.

【0084】また、本発明の強誘電性液晶表示セル構造によれば、両基板間に突起体を有するため、外部からの機械的衝撃に対するセル強度が向上し、液晶配向の乱れを防止することができる。 [0084] According to the ferroelectric liquid crystal display cell structure of the present invention, since they have a protrusion between the substrates, the improved cell strength against mechanical impact from the outside, to prevent disturbance of liquid crystal orientation can.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明のフィラーの無い強誘電性液晶表示セルの断面図である。 1 is a cross-sectional view of a no ferroelectric liquid crystal display cell of the filler of the present invention.

【図2】本発明のフィラーの少ない強誘電性液晶表示セルの断面図である。 2 is a cross-sectional view of a small ferroelectric liquid crystal display cell of the filler of the present invention.

【図3】本発明のフィラーの無い強誘電性液晶表示セルの平面図である。 3 is a plan view of a no ferroelectric liquid crystal display cell of the filler of the present invention.

【図4】本発明のフィラーの少ない強誘電性液晶表示セルの平面図である。 4 is a plan view of the filler less ferroelectric liquid crystal display cell of the present invention.

【図5】本発明の三層スペーサ構造の強誘電性液晶表示セルの斜視図である。 5 is a perspective view of a ferroelectric liquid crystal display cell having a three-layer spacer structure of the present invention.

【図6】本発明の二層スペーサ構造の強誘電性液晶表示セルの製造工程図である。 6 is a manufacturing process diagram of the ferroelectric liquid crystal display cell having a two-layer spacer structure of the present invention.

【図7】従来の非接着一層スペーサ構造の強誘電性液晶表示セルの断面図である。 7 is a cross-sectional view of a ferroelectric liquid crystal display cell of the conventional unbonded more spacer structure.

【図8】従来の接着一層スペーサ構造の強誘電性液晶表示セルの断面図である。 8 is a cross-sectional view of a ferroelectric liquid crystal display cell of a conventional adhesive further spacer structure.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 突起体 2 一方の基板 3 他方の基板 4 対向配向膜 5 一方の電極 6 配向膜 7 他方の電極 8 液晶 9 シール剤 10 スペーサ 11 接着層 12 絶縁膜 13 注入方向 14 コンベア 15 展色板 16 接着剤 17 ブレード 18 ローラー 1 projections 2 one substrate 3 other substrate 4 facing the alignment layer 5 one electrode 6 the alignment film 7 and the other electrode 8 liquid crystal 9 sealing material 10 spacer 11 adhesive layer 12 the insulating film 13 injecting direction 14 the conveyor 15 coatability plate 16 bonded agent 17 blade 18 roller

───────────────────────────────────────────────────── ────────────────────────────────────────────────── ───

【手続補正書】 [Procedure amendment]

【提出日】平成5年7月9日 [Filing date] 1993 July 9

【手続補正1】 [Amendment 1]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】0005 [Correction target item name] 0005

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【0005】通常、空の液晶表示セルの製造工程は、I [0005] Typically, the manufacturing process of an empty liquid crystal display cell of, I
TO透明電極付きガラス基板上に、絶縁膜と配向膜を設け、ラビングにより配向処理を施した後、セル間隔を確保するため一方の基板上に球状または円筒状のスペーサを散布し、エッジシールにより両基板を貼り合わせる順序で行われる。 The TO transparent electrode on a glass substrate, an insulating film and an alignment film provided, after being subjected to orientation treatment by rubbing, spraying a spherical or cylindrical spacers on the substrate one to ensure the cell spacing, the edge seal It is performed in order to bond the two substrates.

【手続補正2】 [Amendment 2]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】0017 [Correction target item name] 0017

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【0017】一方の基板2上の配向膜6と他方の基板3 The orientation on one substrate 2 film 6 and the other substrate 3
上の対向配向膜4との間に液晶8が注入され、シール剤9により封入される。 Liquid crystal 8 is injected between the counter alignment film 4 above, are encapsulated by a sealant 9.

【手続補正3】 [Amendment 3]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】0028 [Correction target item name] 0028

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【0028】 [0028]

【作用】本発明のセル間隔は突起体で規制されるため、 [Action] Since the cell gap of the present invention is restricted by the projections,
通常のスペーサを用いたセルに比べスペーサ密度の不均一に基づくセル間隔のバラツキが無くなるためにセル間隔が高精度に制御される。 Cell interval are precisely controlled to variations in unevenly based cell gap spacer density is eliminated compared with the cell using the conventional spacer.

【手続補正4】 [Amendment 4]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】0038 [Correction target item name] 0038

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【0038】絶縁膜12は、厚さ400Åから2000 [0038] The insulating film 12, 2000 from a thickness of 400Å
ÅまでのITO製の一方の電極または他方の電極を覆って、絶縁膜上にさらに堆積された配向膜の表面の平坦性を高めると共にITO製の透明電極の抵抗値が有機製の配向膜との接触により増大することを抑える働きをする。 Covering the one electrode or the other electrode made of ITO to Å, and an alignment film resistance is made of organic ITO-made transparent electrode to increase the flatness of the surface of the alignment film is further deposited on the insulating film and it serves to reduce that increase by contact.

【手続補正5】 [Amendment 5]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】0046 [Correction target item name] 0046

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【0046】図2は、スペーサが少ない場合の突起体と接着層で構成する本発明の強誘電性液晶表示セルの断面図を示している。 [0046] Figure 2 shows a cross-sectional view of a ferroelectric liquid crystal display cell of the present invention be composed of protrusions and the adhesive layer when the spacer is small.

【手続補正6】 [Amendment 6]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】0048 [Correction target item name] 0048

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【0048】強誘電性液晶表示装置の周辺部は主として有効表示部となる中央部に比べて電極数が少ないことがあるので、スペーサ10を他方の基板3上の対向配向膜4上に散布することは観測される無効表示部のセル間隔を一定に保ち、均一な背景の形成に役立つ。 [0048] Since the strength perimeter of the ferroelectric liquid crystal display device is sometimes number electrode is smaller than the central portion composed mainly effective display portion, spraying spacers 10 on the counter alignment layer 4 on the other substrate 3 it keeps the cell spacing in the ineffective display portion observed constant helps form a uniform background.

【手続補正7】 [Amendment 7]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】0054 [Correction target item name] 0054

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【0054】帯状の突起体形成後、SiO 2をターゲットとしてスパッタリングにより、厚さ800Åの絶縁膜の形成を行った。 [0054] After band-shaped protrusions formed by sputtering a SiO 2 as a target, was formed of an insulating film having a thickness of 800 Å.

【手続補正8】 [Amendment 8]

【補正対象書類名】明細書 [Correction target document name] specification

【補正対象項目名】0059 [Correction target item name] 0059

【補正方法】変更 [Correction method] change

【補正内容】 [Correction contents]

【0059】また、帯状の突起体により強誘電性液晶表示セルを複数の領域に分割することにより、非表示部分の液晶注入堆積が減少すると共に注入時の液晶の移動方向がほぼ注入方向に限定される結果、液晶の注入速度が早くなる長所が生じる。 [0059] In addition, limited by dividing the ferroelectric liquid crystal display cell by band-shaped protrusion in a plurality of regions, approximately infusion movement direction of the liquid crystal when injected together with a liquid crystal injection deposition of the non-display area is reduced is the results in the advantage that the injection speed of the liquid crystal is accelerated.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 則武 和人 大阪府守口市京阪本通2丁目18番地 三洋 電機株式会社内 (72)発明者 玉岡 英二 大阪府守口市京阪本通2丁目18番地 三洋 電機株式会社内 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Noritake Kazuto Osaka Prefecture Moriguchi Keihanhondori 2-chome 18 address Sanyo electric Co., Ltd. in the (72) inventor Eiji Tamaoka Osaka Prefecture Moriguchi Keihanhondori address 2-chome 18 Sanyo electric Co., Ltd. in

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 それぞれ電極の有る一対の平行基板間に、カイラルスメクティック強誘電性液晶を封入した強誘電性液晶表示セルに於て、少なくとも一基板上に接着層を備えた突起体を有することを特徴とする強誘電性液晶表示セル。 To 1. A pair of parallel substrates each have the electrodes, the chiral smectic ferroelectric liquid crystal At a ferroelectric liquid crystal display cell sealed, has a projection body with an adhesive layer on at least one substrate a ferroelectric liquid crystal display cell according to claim.
  2. 【請求項2】 突起体が帯状に形成されることを特徴とする請求項1の強誘電性液晶表示セル。 2. A ferroelectric liquid crystal display cell as claimed in claim 1, protrusions are characterized by being formed in a strip shape.
  3. 【請求項3】 突起体が島状に形成されることを特徴とする請求項1の強誘電性液晶表示セル。 3. A ferroelectric liquid crystal display cell as claimed in claim 1, protrusions are characterized by being formed in an island shape.
JP12433293A 1993-05-26 1993-05-26 Ferroelectric liquid crystal display cell Pending JPH06331970A (en)

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JPH06331970A true JPH06331970A (en) 1994-12-02

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JP12433293A Pending JPH06331970A (en) 1993-05-26 1993-05-26 Ferroelectric liquid crystal display cell

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US5559621A (en) * 1993-07-22 1996-09-24 Toppan Printing Co., Ltd. Liquid crystal having a plurality of rectilinear barrier members
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US6016180A (en) * 1996-07-26 2000-01-18 Sharp Kabushiki Kaisha Liquid crystal device
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US6414739B2 (en) 1997-11-13 2002-07-02 Nec Corporation Method of manufacturing a liquid crystal display device
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US8045125B2 (en) 1997-05-22 2011-10-25 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device having a gap retaining member made of resin formed directly over the driver circuit
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US5559621A (en) * 1993-07-22 1996-09-24 Toppan Printing Co., Ltd. Liquid crystal having a plurality of rectilinear barrier members
EP0772071A1 (en) * 1995-11-06 1997-05-07 Sharp Kabushiki Kaisha Liquid crystal display element and fabrication process thereof
US5880803A (en) * 1995-11-06 1999-03-09 Sharp Kabushiki Kaisha Liquid crystal display element with a portion of an alignment layer covers spacer is directly bonded to the alignment layer on the other substrate
US6016180A (en) * 1996-07-26 2000-01-18 Sharp Kabushiki Kaisha Liquid crystal device
US6118510A (en) * 1996-07-26 2000-09-12 Sharp Kabushiki Kaisha Liquid crystal device
US6266121B1 (en) 1996-11-28 2001-07-24 Sharp Kabushiki Kaisha Liquid crystal display element and method of manufacturing same
GB2319855B (en) * 1996-11-28 2001-04-18 Sharp Kk Liquid crystal display element and method of manufacturing same
FR2760542A1 (en) * 1997-01-31 1998-09-11 Nat Science Council Closed cavity liquid crystal cell
US8045125B2 (en) 1997-05-22 2011-10-25 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device having a gap retaining member made of resin formed directly over the driver circuit
US8854593B2 (en) 1997-05-22 2014-10-07 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device
US6509948B2 (en) 1997-11-13 2003-01-21 Nec Corporation Liquid crystal display device and method of manufacturing the same
US6414739B2 (en) 1997-11-13 2002-07-02 Nec Corporation Method of manufacturing a liquid crystal display device
US6304309B1 (en) 1998-03-19 2001-10-16 Matsushita Electric Industrial Co., Ltd. Liquid crystal display device and method of manufacturing the same
US6563557B2 (en) 1998-03-19 2003-05-13 Matsushita Electric Industrial Co., Ltd. Liquid crystal display device including a stack of plurality of resin film and method for fabricating the same
WO1999047969A1 (en) * 1998-03-19 1999-09-23 Matsushita Electric Industrial Co., Ltd. Liquid crystal display device and method of manufacturing the same
US7923080B2 (en) 2002-05-14 2011-04-12 Fujitsu Limited Liquid crystal display and manufacturing method of same
JP2006338011A (en) * 2005-06-01 2006-12-14 Samsung Electronics Co Ltd Liquid crystal display panel and method for manufacturing the same
US8040484B2 (en) 2005-06-01 2011-10-18 Samsung Electronics Co., Ltd. Liquid crystal display panel having a constant cell gap and method of making the same
JP2007057817A (en) * 2005-08-24 2007-03-08 Dainippon Printing Co Ltd Liquid crystal display element, and method for manufacturing liquid crystal display element
JP2014098927A (en) * 2007-04-06 2014-05-29 Lg Chem Ltd Method for manufacturing spacer for liquid crystal display device, substrate for liquid crystal display device including spacer manufactured by the above method, and liquid crystal display device including the substrate
JP2014038125A (en) * 2012-08-10 2014-02-27 Sharp Corp The liquid crystal display device

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