JP2008242193A - Liquid crystal display element - Google Patents

Liquid crystal display element Download PDF

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JP2008242193A
JP2008242193A JP2007084159A JP2007084159A JP2008242193A JP 2008242193 A JP2008242193 A JP 2008242193A JP 2007084159 A JP2007084159 A JP 2007084159A JP 2007084159 A JP2007084159 A JP 2007084159A JP 2008242193 A JP2008242193 A JP 2008242193A
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polarizing plate
substrate
liquid crystal
gas barrier
crystal display
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Makoto Arai
新井  真
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Citizen Holdings Co Ltd
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Citizen Holdings Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To reduce variations of contours in a gas barrier member between products and also improve workability, in a liquid crystal display element arranged with the gas barrier member at a substrate end for preventing gas from entering from an end surface of a flexible substrate, such as a plastic film. <P>SOLUTION: One polarizing plate 17b is extended from the other polarizing plate 17a and the end of the substrate 11a, 11b, A gas barrier member 18 is arranged so as to cover the end surface of the substrate 11a, 11b, by using an extending part of the polarizing plate 17a as a support. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、プラスチックフィルムなど可撓性のある基板からなる液晶表示素子において、基板の側面から液晶層に浸入しようとするガスを阻止するため基板側面にガスバリアー部材を設けた液晶表示素子に関する。   The present invention relates to a liquid crystal display element comprising a flexible substrate such as a plastic film, wherein a gas barrier member is provided on the side surface of the substrate in order to prevent gas from entering the liquid crystal layer from the side surface of the substrate.

プラスチックフィルム基板からなる液晶表示素子は、軽量で薄いという性質を活かし携帯電話機の表示パネルとして実用化されたことがある。最近では、割れにくい、曲げられる、平面形状の自由度が高い、という特徴にも注目が集まるようになり様々な応用製品が提案されるようになった。   A liquid crystal display element made of a plastic film substrate has been put into practical use as a display panel for a mobile phone by taking advantage of its light weight and thin properties. Recently, attention has been focused on the features of being hard to break, being bent, and having a high degree of freedom in planar shape, and various applied products have been proposed.

これら可撓性材料は、ガラスと違いガス或いは水蒸気透過性があるため、常温常圧下でガスあるいは水蒸気が透過する。もし仮に可撓性材料だけを使った基板で液晶表示素子を作成すると、ガスが基板を通して液晶内に溶け込み、液晶内に溶け込んだガスが飽和状態に達していると落下等の衝撃により液晶表示素子内に気泡が発生することがある。そこでこれまで基板支持材の表面にガスが透過し難い無機物ないし有機物からなるガスバリアー層を設けていた。ガスバリアー層は、基板の両面に設けられる場合もあるが、製造工程を簡略化させるため基板の片側の面だけに設ける場合もある。長期的な信頼性を重視する場合は両面にガスバリアー層を設けることが多い。   Since these flexible materials are permeable to gas or water vapor unlike glass, gas or water vapor permeates under normal temperature and pressure. If a liquid crystal display element is made with a substrate using only a flexible material, the gas dissolves in the liquid crystal through the substrate, and if the gas dissolved in the liquid crystal reaches a saturated state, the liquid crystal display element is caused by an impact such as dropping. Bubbles may be generated inside. Therefore, a gas barrier layer made of an inorganic material or an organic material that hardly permeates gas has been provided on the surface of the substrate support material. The gas barrier layer may be provided on both sides of the substrate, but may be provided only on one side of the substrate in order to simplify the manufacturing process. When long-term reliability is important, gas barrier layers are often provided on both sides.

ガスバリアー層を有する液晶表示素子は、平面的にはガスの浸入を押さえ込んでいる。しかし基板の切断によって生じた側面(以下端面と称する)は基板支持材がむき出しになっているので、ここから基板内にガスが浸入する。基板の柔軟性を確保するため液晶層側のガスバリアー層は、ガス透過度の高い有機物を使うか、ガス透過率を下げきれていないごく薄い無機材料膜を使ざるを得ない。この結果、長期的には基板端面からガスバリアー層を経由して液晶層にガスが浸入する(例えば文献1)。   A liquid crystal display element having a gas barrier layer suppresses the ingress of gas in a plan view. However, since the substrate support material is exposed on the side surface (hereinafter referred to as end surface) generated by cutting the substrate, gas enters the substrate from here. In order to ensure the flexibility of the substrate, the gas barrier layer on the liquid crystal layer side must use an organic substance having a high gas permeability, or use a very thin inorganic material film whose gas permeability has not been lowered. As a result, gas enters the liquid crystal layer from the end face of the substrate through the gas barrier layer in the long term (for example, Document 1).

この対策として文献1に示された従来例1(文献中では実施例1)では、シールを含めた液晶表示素子の側面にエポキシ接着剤を塗布し、基板端面からのガスの浸入を防いでいた。この断面図を図6に示す。液晶表示素子は、図の下から、反射板68、偏光板67、基板61、透明電極62、配向膜63、スペーサ64が混入した液晶層66、配向膜63、透明電極62、基板61、偏光板67が積層している。ここで基板61は、ポリカーボネートフィルムを基板支持材とし、両面にEVA(エチレンと酢酸ビニルの共重合体)とフェノキシ樹脂からなる2層のガスバリアー層を有している。表示素子の側面部では、シール65と2枚の基板61の端面とにエポキシ接着剤69が塗布されている。なお文献1の記述にあわせて基板61は基板支持材とガスバリアー層から成るものとした(以下同様)。   As a countermeasure against this, in Conventional Example 1 shown in Document 1 (Example 1 in the document), an epoxy adhesive was applied to the side surface of the liquid crystal display element including the seal to prevent gas from entering from the end face of the substrate. . This sectional view is shown in FIG. From the bottom of the figure, the liquid crystal display element includes a reflective plate 68, a polarizing plate 67, a substrate 61, a transparent electrode 62, an alignment film 63, a liquid crystal layer 66 mixed with a spacer 64, an alignment film 63, a transparent electrode 62, a substrate 61, and a polarization. Plates 67 are stacked. Here, the substrate 61 uses a polycarbonate film as a substrate support material, and has two gas barrier layers made of EVA (copolymer of ethylene and vinyl acetate) and phenoxy resin on both sides. In the side surface portion of the display element, an epoxy adhesive 69 is applied to the seal 65 and the end surfaces of the two substrates 61. In accordance with the description in Document 1, the substrate 61 is composed of a substrate support material and a gas barrier layer (the same applies hereinafter).

文献1で示された従来例2(文献中では実施例4)では、液晶セル全体をエポキシ接着剤に浸潤してから偏光板を貼り付け、基板端面からのガスの浸入を防いでいる。この断面図を図7に示す。従来例1と同じ部材は同じ番号で示す。図から読み取れる従来例1との違いは、偏光板67と基板61の間にもエポキシ接着剤69の層があること、偏光板67が基板61より外側にはみ出している(以下延出と称する)こと、および側面のエポキシ接着剤が左右に盛り上がっていないことである。   In Conventional Example 2 shown in Document 1 (Example 4 in the document), the entire liquid crystal cell is infiltrated with an epoxy adhesive and then a polarizing plate is attached to prevent gas from entering from the end face of the substrate. This cross-sectional view is shown in FIG. The same members as those in Conventional Example 1 are denoted by the same numbers. The difference from Conventional Example 1 that can be seen from the figure is that there is a layer of epoxy adhesive 69 between the polarizing plate 67 and the substrate 61, and the polarizing plate 67 protrudes outside the substrate 61 (hereinafter referred to as extension). And the side epoxy adhesive is not raised to the left or right.

その他、文献1には側面にガスバリアー部材を設ける例として、偏光板まで含めた液晶表示素子の側面にエポキシ接着剤を塗布する例、基板端面にのみエポキシ接着剤を塗布す
る例などが示されている。
特開2001−221998号公報
In addition, Document 1 shows an example in which a gas barrier member is provided on a side surface, an example in which an epoxy adhesive is applied to the side surface of a liquid crystal display element including a polarizing plate, an example in which an epoxy adhesive is applied only to an end surface of a substrate, ing.
JP 2001-221998 A

文献1の従来例1のように側面に接着剤を塗布する方法では、たとえ基板と接着剤の密着力や接着剤の表面張力などを管理しても、接着剤が垂れてしまうため塗布後の断面形状がはっきりしない。このため液晶表示素子の平面形状に関する公差を大きくせざるを得ない。   In the method of applying the adhesive to the side surface as in Conventional Example 1 of Document 1, even if the adhesive force between the substrate and the adhesive or the surface tension of the adhesive is controlled, the adhesive droops. The cross-sectional shape is not clear. For this reason, the tolerance regarding the planar shape of the liquid crystal display element must be increased.

また文献1の従来例2のように液晶セル全体をエポキシ接着剤に浸潤してから偏光板を貼り付ける方法では、偏光板の外形に注意すれば外形公差は小さくでききる。しかし基板表面に粘着物質が存在するため偏光板貼付けなどの組立作業に支障をきたすという課題がある。   Also, in the method of attaching the polarizing plate after infiltrating the entire liquid crystal cell into the epoxy adhesive as in Conventional Example 2 of Document 1, the outer tolerance can be reduced if attention is paid to the outer shape of the polarizing plate. However, since an adhesive substance exists on the surface of the substrate, there is a problem that the assembly work such as sticking a polarizing plate is hindered.

そこで本発明の目的は、プラスチックフィルムなど可撓性のある基板の端面から浸入しようとするガスを阻止するため基板端部にガスバリアー部材を設けた液晶表示素子において、ガスバリアー部材の外形のバラツキが製品間で小さく、作業性の良い液晶表示素子を提供することである。   Accordingly, an object of the present invention is to provide a liquid crystal display element in which a gas barrier member is provided at the end of the substrate in order to prevent gas from entering from the end surface of a flexible substrate such as a plastic film. Is to provide a liquid crystal display element that is small between products and has good workability.

本発明は、2枚の可撓性を有する基板がシールを介して積層し、その基板とシールから形成された空間に液晶が注入された液晶表示素子において、液晶が注入された面とは反対側の基板面に上側と下側の偏光板を備え、上側の偏光板と下側の偏光板のうち一方の偏光板が他方の偏光板および基板の端部から延出して形成した角部に基板の端面を覆うようにガスバリアー部材を設けたことを特徴とするものである。   The present invention relates to a liquid crystal display element in which two flexible substrates are laminated through a seal and liquid crystal is injected into a space formed by the substrate and the seal, and is opposite to the surface on which the liquid crystal is injected. The upper and lower polarizing plates are provided on the side substrate surface, and one of the upper polarizing plate and the lower polarizing plate has a corner formed by extending from the other polarizing plate and the end of the substrate. A gas barrier member is provided so as to cover the end face of the substrate.

また、ガスバリアー部材を角部に塗布したことが好ましい。   Moreover, it is preferable that the gas barrier member is applied to the corners.

また、シールの側面と基板の端面とが概ね同一平面上にあることが好ましい。   Further, it is preferable that the side surface of the seal and the end surface of the substrate are substantially on the same plane.

延出した偏光板と基板端面で形成された角部において、延出した偏光板の表面を支持台とし、塗布などの手法で基板端面を覆うようにガスバリアー部材を設ける。このときガスバリアー部材が偏光板の延出部からはみ出すことはない。なおガスバリアー部材の形状は表面張力と分量によって上に凸か下に凸の曲面を形成する。   At the corner formed by the extended polarizing plate and the substrate end surface, a gas barrier member is provided so as to cover the substrate end surface by a method such as coating, using the surface of the extended polarizing plate as a support base. At this time, the gas barrier member does not protrude from the extending portion of the polarizing plate. The shape of the gas barrier member forms a curved surface that is convex upward or downward depending on the surface tension and quantity.

本発明によれば、偏光板の延出幅で平面的な最大外形が決まるので、偏光板の外形に注意を払うだけで製品間の外形のバラツキを小さくできる。さらに偏光板の延出部表面を支えとして基板端面にガスバリアー部材を配設すればよいので作業性が良い。   According to the present invention, since the planar maximum outer shape is determined by the extending width of the polarizing plate, variation in the outer shape between products can be reduced only by paying attention to the outer shape of the polarizing plate. Furthermore, workability is good because a gas barrier member may be disposed on the end surface of the substrate with the surface of the extending portion of the polarizing plate as a support.

基板間のギャップ、ないしシールの厚さは数μm〜十数μm程度である。このため基板端面をガスバリアー部材で覆うと、自然にシール周辺部もガスバリアー部材で覆われてしまう。基板端部とシールまで間に僅かながらでも距離があり、完全にガスバリアー部材とシール側面とが接するようにしようとする場合、基板とシールで形成される空間にガスバリアー部材を浸み込ませる。このとき一定の待ち時間と粘性の調節が必要となる。シールの側面と基板の端面とが概ね同一平面上にあれば、前述の浸み込ませるための時間が不要となるだけでなく粘度管理も緩やかになるので作業性が向上する。   The gap between the substrates or the thickness of the seal is about several μm to several tens of μm. For this reason, when the substrate end face is covered with the gas barrier member, the seal peripheral portion is naturally covered with the gas barrier member. When there is a slight distance between the edge of the substrate and the seal, and the gas barrier member and the side surface of the seal are to be completely in contact with each other, the gas barrier member is immersed in the space formed by the substrate and the seal. . At this time, it is necessary to adjust a certain waiting time and viscosity. If the side surface of the seal and the end surface of the substrate are substantially on the same plane, not only the time for the above-mentioned penetration is unnecessary, but also the viscosity management is moderated, so that workability is improved.

以下、添付図面を参照しながら、本発明の好適な実施形態について詳細に説明する。なお、図面の説明において、同一または相当要素には同一の符号を付し、重複する説明は省略する。また縮尺は適宜変更している。
(第1実施形態)
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted. The scale is changed as appropriate.
(First embodiment)

図1は、本発明の第1の実施形態に係り、ガスバリアー部材を配設する前の液晶表示素子を示す斜視図である。図1において角部を説明する。偏光板17bの上に、下側の基板11b、上側の基板11a、上側の偏光板17aが積層している。平面的には、基板11a、11bと偏光板17aは大きさが等しく、偏光板17bが大きくなっている。このため基板11a、11bと偏光板17aの端面が揃い、偏光板17bはこれらの端面から延出する。この端面と偏光板17bの表面から形成される領域が角部である。   FIG. 1 is a perspective view showing a liquid crystal display element according to the first embodiment of the present invention before a gas barrier member is provided. The corners will be described with reference to FIG. A lower substrate 11b, an upper substrate 11a, and an upper polarizer 17a are stacked on the polarizer 17b. In plan view, the substrates 11a and 11b and the polarizing plate 17a are equal in size, and the polarizing plate 17b is large. Therefore, the end surfaces of the substrates 11a and 11b and the polarizing plate 17a are aligned, and the polarizing plate 17b extends from these end surfaces. A region formed from this end face and the surface of the polarizing plate 17b is a corner.

図2は、本発明の第1の実施形態に係る液晶表示素子を示す断面図である。図2においてまず部材の積層構造を説明する。図の下側では、偏光板17b、下側の基板支持材11、下側のガスバリアー層18、下側の透明電極12、下側の配向膜13が積層している。同様に図の上側では、上側の配向膜13、上側の透明電極12、上側のガスバリアー層18、上側の基板支持材11、偏光板17aが積層している。上下の基板支持材11とガスバリアー層18の積層物が上下の基板11a,11bである。上下の基板11a,11b間とシール15から形成された空間に液晶が注入されている。この空間にあるスペーサ14と液晶で液晶層16を形成する。   FIG. 2 is a cross-sectional view showing the liquid crystal display element according to the first embodiment of the present invention. In FIG. 2, the laminated structure of members will be described first. On the lower side of the figure, a polarizing plate 17b, a lower substrate support 11, a lower gas barrier layer 18, a lower transparent electrode 12, and a lower alignment film 13 are laminated. Similarly, on the upper side of the figure, the upper alignment film 13, the upper transparent electrode 12, the upper gas barrier layer 18, the upper substrate support 11 and the polarizing plate 17a are laminated. A laminate of the upper and lower substrate support members 11 and the gas barrier layer 18 is the upper and lower substrates 11a and 11b. Liquid crystal is injected into the space formed by the seal 15 between the upper and lower substrates 11a and 11b. A liquid crystal layer 16 is formed of the spacer 14 and the liquid crystal in this space.

上下の偏光板17a,17bは厚さが100μmである。基板支持材11は厚さが100μmのポリカーボネイトからなり、ガスバリアー層18は厚さが0.03μmの酸化シリコンSiOxからなる。透明電極12は厚さが0.03μmのITOからなり、配向膜13は厚さが0.05μmのポリイミドからなる。シール15は幅が1mmでエポキシ樹脂からなり、液晶層16の厚さは5μmである。   The upper and lower polarizing plates 17a and 17b have a thickness of 100 μm. The substrate support 11 is made of polycarbonate having a thickness of 100 μm, and the gas barrier layer 18 is made of silicon oxide SiOx having a thickness of 0.03 μm. The transparent electrode 12 is made of ITO having a thickness of 0.03 μm, and the alignment film 13 is made of polyimide having a thickness of 0.05 μm. The seal 15 has a width of 1 mm and is made of an epoxy resin, and the thickness of the liquid crystal layer 16 is 5 μm.

次にガスバリアー部材19に関わる構造を説明する。偏光板17bは基板11bから1.0mm延出している。偏光板17aの端面と上下の基板11a、11bの端面と偏光板17bの表面で形成された角部にエポキシ樹脂からなるガスバリアー部材19が塗布されている。ガスバリアー部材19は、底辺が偏光板17bの延出部と一致し、偏光板17aと上下の基板11a、11bの端面を覆っている。またシール15の側面は、基板11a、11bの端面と直線上に並んでガスバリアー部材19と接している。これは基板11a、11bの端面とシール15の側面が同一平面上にあることを示している。ガスバリアー部材の斜辺は表面張力により曲線を描くが、図では直線で示している。   Next, a structure related to the gas barrier member 19 will be described. The polarizing plate 17b extends 1.0 mm from the substrate 11b. A gas barrier member 19 made of an epoxy resin is applied to corners formed by the end face of the polarizing plate 17a, the end faces of the upper and lower substrates 11a and 11b, and the surface of the polarizing plate 17b. The gas barrier member 19 has a bottom that coincides with the extending portion of the polarizing plate 17b and covers the polarizing plate 17a and the end surfaces of the upper and lower substrates 11a and 11b. Further, the side surface of the seal 15 is in contact with the gas barrier member 19 along a straight line with the end surfaces of the substrates 11a and 11b. This indicates that the end surfaces of the substrates 11a and 11b and the side surface of the seal 15 are on the same plane. The hypotenuse of the gas barrier member draws a curve depending on the surface tension, but is shown as a straight line in the figure.

図3は、本発明の第1の実施形態に係り、電極取り出し部が分かるように描いた液晶表示素子を示す平面図(a)とその断面図(b)、および要部断面図(c)である。図3において外部回路との接続状況と、実物と相似したガスバリアー部材の状況とを説明する。   FIG. 3 relates to the first embodiment of the present invention, and FIG. 3A is a plan view showing a liquid crystal display element drawn so that an electrode lead-out portion can be seen, a cross-sectional view thereof, and a cross-sectional view of a main part thereof It is. In FIG. 3, the connection state with the external circuit and the state of the gas barrier member similar to the actual one will be described.

図3(a)において、駆動信号は液晶表示素子に柔軟性のある回路基板32(以下FPCと称する)を介して伝達される。このFPC32の下面の配線電極(図示せず)は、下側の基板11b上に形成され、上側の基板11aの切り欠いた部分(以下電極取り出し部と称する)から露出した透明電極(図示せず)と異方性導電シート(図示せず)を介して接着している。電極取り出し部において、上側の偏光板17aも同じ形状に切り欠いており、シール15にも凹部がある。下側の偏光板17bは下側の基板11bから外側に延出している。なお説明のためガスバリアー部材塗布前の状態を描いたのでガスバリアー部材19とFPC32の保護部材は図示していない。   In FIG. 3A, the drive signal is transmitted to the liquid crystal display element via a flexible circuit board 32 (hereinafter referred to as FPC). A wiring electrode (not shown) on the lower surface of the FPC 32 is formed on the lower substrate 11b, and is a transparent electrode (not shown) exposed from a notched portion (hereinafter referred to as an electrode extraction portion) of the upper substrate 11a. And an anisotropic conductive sheet (not shown). In the electrode extraction part, the upper polarizing plate 17a is also cut out in the same shape, and the seal 15 also has a recess. The lower polarizing plate 17b extends outward from the lower substrate 11b. In addition, since the state before application | coating of a gas barrier member was drawn for description, the protection member of the gas barrier member 19 and FPC32 is not shown in figure.

図3(b)は図3(a)の線分A−Bに沿った断面図である。なおガスバリアー部材1
9とFPC32の保護部材31の塗布後を示している。図の下側から、偏光板17b、下基板11b、液晶層16、基板11a、偏光板17aが積層していることと、左端におけるガスバリアー部材19の塗布情況は図3で説明したとおりである。図の右側の電極取り出し部では、偏光板17aと基板11aの端面と、シール15と基板11bの露出面とFPC32の端部(および裏面の一部)からなる空間にガスバリアー部材19が塗布されている。FPC32を接着した後、周辺部にガスバリアー部材19を塗布する際に電極取り出し部にもガスバリアー部材を塗布した。FPC32の下面と基板11bの端面と偏光板17の延出部(および端面)からなる空間にしみ込むようにFPC32の保護部材31が塗布されている。この保護部材31はFPC配線の腐食と断線の防止に加え、基板11bのガスバリアーも兼ねている。
FIG. 3B is a cross-sectional view taken along line AB in FIG. Gas barrier member 1
9 and after application of the protective member 31 of the FPC 32 are shown. From the bottom of the figure, the polarizing plate 17b, the lower substrate 11b, the liquid crystal layer 16, the substrate 11a, and the polarizing plate 17a are laminated, and the coating situation of the gas barrier member 19 at the left end is as described in FIG. . In the electrode extraction part on the right side of the figure, the gas barrier member 19 is applied to the space consisting of the polarizing plate 17a and the end surface of the substrate 11a, the seal 15 and the exposed surface of the substrate 11b, and the end portion of the FPC 32 (and part of the back surface). ing. After the FPC 32 was bonded, the gas barrier member was also applied to the electrode extraction portion when the gas barrier member 19 was applied to the peripheral portion. The protective member 31 of the FPC 32 is applied so as to penetrate into the space formed by the lower surface of the FPC 32, the end surface of the substrate 11b, and the extending portion (and end surface) of the polarizing plate 17. The protective member 31 also serves as a gas barrier for the substrate 11b in addition to preventing corrosion and disconnection of the FPC wiring.

図3(c)は図3(b)の左端を実物と相似するように描いた要部断面図である。偏光板17aと基板11a,11bの積層体の厚さは概ね0.6mmであり、偏光板17bの延出幅は1.0mmである。ガスバリアー部材19は下に凸となる曲線を描いている。   FIG. 3C is a cross-sectional view of a main part in which the left end of FIG. The thickness of the laminate of the polarizing plate 17a and the substrates 11a and 11b is approximately 0.6 mm, and the extending width of the polarizing plate 17b is 1.0 mm. The gas barrier member 19 has a curved line that protrudes downward.

図4は、本発明の第1の実施形態に係る液晶表示素子を使った装置の断面図である。シャーシの底面から観察者側に向かって、偏光板17a、基板11a、基板11b、偏光板17bが積層している。シール、液晶層等は図示していない。このように表裏を反転したことでガスバリアー材料19は偏光板17bによって遮蔽され視認されにくくなる。液晶素子の表面とシャーシの上面とを一致させ装置の薄型化を図ろうとするときなど、ガスバリアー部材19が偏光板17bに完全に遮蔽されるので、偏光板17bの外形加工精度に注意するだけでデザイン性の向上が図れる。
(第2実施形態)
FIG. 4 is a sectional view of an apparatus using the liquid crystal display element according to the first embodiment of the present invention. A polarizing plate 17a, a substrate 11a, a substrate 11b, and a polarizing plate 17b are stacked from the bottom of the chassis toward the viewer. The seal, the liquid crystal layer, etc. are not shown. By reversing the front and back in this way, the gas barrier material 19 is shielded by the polarizing plate 17b and is hardly visible. Since the gas barrier member 19 is completely shielded by the polarizing plate 17b when trying to make the device thinner by matching the surface of the liquid crystal element and the upper surface of the chassis, just pay attention to the accuracy of the outer shape of the polarizing plate 17b. In this way, the design can be improved.
(Second Embodiment)

図5は、本発明の他の実施形態に係る液晶表示素子を示す断面図である。図5(a)において第2の実施形態を説明する。図の下から、偏光板54aと、液晶層を挟んで2枚のプラスチック基板が積層した積層物52(以下プラスチックセルと称する)と、偏光板51aが積層している。偏光板54aはプラスチックセル52よりも幅が広い一方、偏光板51aはプラスチックセル52よりも幅が狭い。偏光板54aの延出部を支持台にして、偏光板51aの端面と、プラスチックセル52の端面(および表面の一部)とを覆うようにガスバリアー部材53aが塗布されている。プラスチックセル52の上側(偏光板51a側)の角でも十分なガスバリアー部材53aの厚み(横方向)を確保するため、ガスバリアー部材53aの断面を上に凸な曲線とした。
(第3実施形態)
FIG. 5 is a cross-sectional view showing a liquid crystal display device according to another embodiment of the present invention. A second embodiment will be described with reference to FIG. From the bottom of the figure, a polarizing plate 54a, a laminate 52 (hereinafter referred to as a plastic cell) in which two plastic substrates are stacked with a liquid crystal layer interposed therebetween, and a polarizing plate 51a are stacked. The polarizing plate 54 a is wider than the plastic cell 52, while the polarizing plate 51 a is narrower than the plastic cell 52. A gas barrier member 53a is applied so as to cover the end surface of the polarizing plate 51a and the end surface (and a part of the surface) of the plastic cell 52 with the extended portion of the polarizing plate 54a as a support. In order to secure a sufficient thickness (lateral direction) of the gas barrier member 53a even at the corner on the upper side (polarizing plate 51a side) of the plastic cell 52, the cross section of the gas barrier member 53a has a convex curve.
(Third embodiment)

図5(b)において第3の実施形態を説明する。図の下から、偏光板54b、プラスチックセル52、偏光板51bが積層している。偏光板51bはプラスチックセル52よりわずかに幅が広く、偏光板54bは偏光板51bよりも幅が広い。偏光板54bの延出部を支持台にして、偏光板51bの端面(および底面)と、プラスチックセル52の端面とを覆うようにガスバリアー部材53bが塗布されている。偏光板51bの延出によりプラスチックセル52の上側(偏光板51b側)の角でも十分なガスバリアー部材の厚み(横方向)が確保できる。
(第4実施形態)
A third embodiment will be described with reference to FIG. From the bottom of the figure, a polarizing plate 54b, a plastic cell 52, and a polarizing plate 51b are stacked. The polarizing plate 51b is slightly wider than the plastic cell 52, and the polarizing plate 54b is wider than the polarizing plate 51b. A gas barrier member 53b is applied so as to cover the end surface (and bottom surface) of the polarizing plate 51b and the end surface of the plastic cell 52 with the extending portion of the polarizing plate 54b as a support. By extending the polarizing plate 51b, a sufficient thickness (lateral direction) of the gas barrier member can be secured even at the upper corner (the polarizing plate 51b side) of the plastic cell 52.
(Fourth embodiment)

図5(c)において第4の実施形態を説明する。図の下から、偏光板54c、プラスチックセル52、偏光板51cが積層している。偏光板51cは図の右側でプラスチックセル52から延出し、偏光板54cは図の左側でプラスチックセル52から延出している。図の右側では偏光板51cの延出部を支持台にして、プラスチックセル52の端面と偏光板54cの端面を覆うようにガスバリアー部材53cが塗布されている。図の左側では偏光板54cの延出部を支持台にして、プラスチックセル52の端面と偏光板51cの端面
を覆うようにガスバリアー部材53cが塗布されている。液晶表示素子の辺によって延出させる偏光板を変えることでシャーシに組み込む際の自由度を広げることが可能となる。
A fourth embodiment will be described with reference to FIG. From the bottom of the figure, a polarizing plate 54c, a plastic cell 52, and a polarizing plate 51c are stacked. The polarizing plate 51c extends from the plastic cell 52 on the right side of the drawing, and the polarizing plate 54c extends from the plastic cell 52 on the left side of the drawing. On the right side of the figure, the gas barrier member 53c is applied so as to cover the end face of the plastic cell 52 and the end face of the polarizing plate 54c, with the extending portion of the polarizing plate 51c as a support. On the left side of the figure, the gas barrier member 53c is applied so as to cover the end face of the plastic cell 52 and the end face of the polarizing plate 51c, with the extending portion of the polarizing plate 54c as a support. By changing the polarizing plate to be extended depending on the side of the liquid crystal display element, it is possible to increase the degree of freedom when incorporating it into the chassis.

本発明の第1の実施形態に係る液晶表示装置を示す斜視図である。1 is a perspective view showing a liquid crystal display device according to a first embodiment of the present invention. 本発明の第1の実施形態に係る液晶表示素子を示す断面図である。It is sectional drawing which shows the liquid crystal display element which concerns on the 1st Embodiment of this invention. 本発明の第1の実施形態に係る液晶表示素子を示す平面図(a)と その断面図(b)、および要部断面図である。1A is a plan view showing a liquid crystal display device according to a first embodiment of the present invention, FIG. 本発明の第1の実施形態に係る液晶表示素子を使った装置の断面図である。It is sectional drawing of the apparatus using the liquid crystal display element which concerns on the 1st Embodiment of this invention. 本発明の他の実施形態に係る液晶表示素子を示す断面図である。It is sectional drawing which shows the liquid crystal display element which concerns on other embodiment of this invention. 従来例1の断面図である。It is sectional drawing of the prior art example 1. FIG. 従来例2の断面図である。It is sectional drawing of the prior art example 2. FIG.

符号の説明Explanation of symbols

11…基板支持材、11a,11b,61…基板、12,62…透明電極、13,63…配向膜、14,64…スペーサ、15,65…シール、16,66…液晶層、17a,17b,51a,51b,51c,54a,54b,54c,67…偏光板、18…ガスバリアー層、19,53a,69…ガスバリアー部材、52…プラスチックセル、68…反射板。 DESCRIPTION OF SYMBOLS 11 ... Substrate support material, 11a, 11b, 61 ... Substrate, 12, 62 ... Transparent electrode, 13, 63 ... Alignment film, 14, 64 ... Spacer, 15, 65 ... Seal, 16, 66 ... Liquid crystal layer, 17a, 17b , 51a, 51b, 51c, 54a, 54b, 54c, 67 ... polarizing plate, 18 ... gas barrier layer, 19, 53a, 69 ... gas barrier member, 52 ... plastic cell, 68 ... reflector.

Claims (3)

2枚の可撓性を有する基板がシールを介して積層し、該基板と該シールから形成された空間に液晶を注入した液晶表示素子において、前記液晶を注入した面とは反対側の基板面にそれぞれ偏光板を備え、一方の偏光板が他方の偏光板および前記基板の端部から延出し、該偏光板の延出部と該基板の端面とで形成した角部に該端面を覆うようにガスバリアー部材を設けたことを特徴とする液晶表示素子。   In a liquid crystal display element in which two flexible substrates are stacked through a seal and liquid crystal is injected into a space formed from the substrate and the seal, the substrate surface opposite to the surface into which the liquid crystal is injected Each polarizing plate includes a polarizing plate, and one polarizing plate extends from the other polarizing plate and an end portion of the substrate, and covers the end surface at a corner formed by the extending portion of the polarizing plate and the end surface of the substrate. A liquid crystal display element comprising a gas barrier member provided on the liquid crystal display element. 前記ガスバリアー部材を前記角部に塗布したことを特徴とする請求項1に記載の液晶表示素子。   The liquid crystal display element according to claim 1, wherein the gas barrier member is applied to the corner portion. 前記シールの側面と前記基板の端面とが概ね同一平面上にあることを特徴とする請求項1ないし2に記載の液晶表示素子。
3. The liquid crystal display element according to claim 1, wherein a side surface of the seal and an end surface of the substrate are substantially on the same plane.
JP2007084159A 2007-03-28 2007-03-28 Liquid crystal display element Pending JP2008242193A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010181459A (en) * 2009-02-03 2010-08-19 Citizen Holdings Co Ltd Liquid crystal panel
US9529225B2 (en) 2014-02-21 2016-12-27 Japan Display Inc. Liquid crystal display device and method of manufacturing a liquid crystal display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010181459A (en) * 2009-02-03 2010-08-19 Citizen Holdings Co Ltd Liquid crystal panel
US9529225B2 (en) 2014-02-21 2016-12-27 Japan Display Inc. Liquid crystal display device and method of manufacturing a liquid crystal display device
US9778505B2 (en) 2014-02-21 2017-10-03 Japan Display Inc. Liquid crystal display device and method of manufacturing a liquid crystal display device

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