JP2002341354A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JP2002341354A JP2002341354A JP2001146644A JP2001146644A JP2002341354A JP 2002341354 A JP2002341354 A JP 2002341354A JP 2001146644 A JP2001146644 A JP 2001146644A JP 2001146644 A JP2001146644 A JP 2001146644A JP 2002341354 A JP2002341354 A JP 2002341354A
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- Prior art keywords
- substrate
- liquid crystal
- crystal display
- spacer
- pillar spacer
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、液晶表示素子に
関する。[0001] The present invention relates to a liquid crystal display device.
【０００２】[0002]
【従来の技術】従来、液晶表示素子は種々の表示装置に
用いられ、ポケットＴＶ、ワープロ、ノート型パソコン
等の需要が拡大している。2. Description of the Related Art Conventionally, liquid crystal display devices have been used for various display devices, and demands for pocket TVs, word processors, notebook computers and the like have been increasing.
【０００３】従来一般的な液晶表示素子は、２枚の透明
電極基板間に液晶を狭持し、当面電極間に電圧を印加
し、印加電圧に応じて液晶分子の配向状態を変化させる
ことによって光の透過率を制御している。In a conventional general liquid crystal display device, a liquid crystal is sandwiched between two transparent electrode substrates, a voltage is applied between electrodes for the time being, and the alignment state of liquid crystal molecules is changed according to the applied voltage. The light transmittance is controlled.
【０００４】液晶表示素子の一般的な製造方法は、基板
上に形成したポリイミド等の配向層表面を樹脂繊維布を
用いて擦るラビング法によって液晶の配向方位が決めら
れた基板に液晶を保持するためのシール材料を塗布し、
基板間の厚みを制御するビーズ材料を分散する。そし
て、ラビング処理を行った対向基板をシール材料を塗布
した基板と貼り合わせ、シール材料を硬化させる。そし
て真空注入法によって基板間に液晶材料を狭持し、そし
て、液晶表示素子にはその表示モードや用途に応じてパ
ネル表裏面に偏光板が貼り付けられ液晶表示素子が完成
する。A general method of manufacturing a liquid crystal display element is to hold the liquid crystal on a substrate whose orientation is determined by a rubbing method in which the surface of an alignment layer of polyimide or the like formed on the substrate is rubbed with a resin fiber cloth. Apply sealing material for
A bead material for controlling the thickness between the substrates is dispersed. Then, the counter substrate subjected to the rubbing treatment is bonded to the substrate coated with the sealing material, and the sealing material is cured. Then, a liquid crystal material is sandwiched between the substrates by a vacuum injection method, and a polarizing plate is attached to the front and back surfaces of the panel according to the display mode and use of the liquid crystal display element, thereby completing the liquid crystal display element.
【０００５】図３に示す従来の液晶表示素子の一例にお
いては、以下のような課題がある。An example of the conventional liquid crystal display device shown in FIG. 3 has the following problems.
【０００６】まず、基板１１と基板１２間の基板間隔精
度がその表示品位を決める。すなわち、液晶表示素子に
基板間隔の不均一が存在する場合、液晶層２４の厚みに
面内ばらつきが生じる。First, the display quality is determined by the accuracy of the distance between the substrates 11 and 12. In other words, when the liquid crystal display element has non-uniform substrate spacing, in-plane variations occur in the thickness of the liquid crystal layer 24.
【０００７】次に、基板１１と基板１２間に挟まれたビ
ーズ２６のうち、表示領域２７に分散されたビーズ２６
により液晶配向乱れが発生し光抜けが生じ、ざらつき等
の表示品位の低下を生じる。Next, among the beads 26 sandwiched between the substrate 11 and the substrate 12, the beads 26 dispersed in the display area 27
As a result, the alignment of the liquid crystal is disturbed, light is leaked, and the display quality such as roughness is deteriorated.
【０００８】また、上記のような、パネルを形成する場
合、ビーズ２６を基板上に分散させるには、乾式または
湿式などの方式により一方の基板上にビーズ２６の散布
が行なわれるが、このビーズ散布を行なう際、ビーズ２
６の凝集・偏在や異物の混入のため、液晶表示素子に点
欠陥や表示むらが生じ、製造工程での歩留りを悪くす
る。In the case of forming a panel as described above, in order to disperse the beads 26 on the substrate, the beads 26 are dispersed on one of the substrates by a method such as a dry method or a wet method. When spraying, bead 2
Due to the aggregation and uneven distribution of 6 and the inclusion of foreign matter, point defects and display unevenness occur in the liquid crystal display element, and the yield in the manufacturing process is deteriorated.
【０００９】そこで、以上のような課題を解決するため
に、従来のビーズの分散方式による基板間隔の制御では
なく、図４に示す様に一方の基板１１，１２上に予め柱
スペーサ１７を形成する方式が提案されている。この方
式によれば、ビーズ散布によって生ずる液晶層２４の厚
みむらやざらつきといった表示品位の低下をなくすこと
が出来る。図３および図４において、１３はガラス基
板、１４は遮光層、１５は色層、１６は透明電極、１９
はガラス基板、２１はスイッチング素子、２２は画素電
極、２３は配向膜、２５はシール材である。Therefore, in order to solve the above-mentioned problem, column spacers 17 are formed in advance on one of the substrates 11 and 12 as shown in FIG. Have been proposed. According to this method, it is possible to prevent a decrease in display quality such as uneven thickness and roughness of the liquid crystal layer 24 caused by scattering of beads. 3 and 4, 13 is a glass substrate, 14 is a light-shielding layer, 15 is a color layer, 16 is a transparent electrode, 19
Is a glass substrate, 21 is a switching element, 22 is a pixel electrode, 23 is an alignment film, and 25 is a sealing material.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、このよ
うな柱スペーサにて基板間を規定する液晶表示素子では
柱スペーサを必要以上に数多く配置すると、２枚の電極
間隔を弾力が小さくなるため、液晶表示素子を低温に曝
すと、液晶の体積収縮に基板間隔が追従せず、低温気泡
不良が発生する。また、その反対に柱スペーサの密度を
小さくすると、低温気泡発生のマージンは広がるが、押
圧や変形といった等負荷が液晶表示素子に加わったり、
液晶表示素子の製造工程によって柱スペーサに加わる負
荷によって、柱スペーサの厚みが変化し易く、基板間隔
に変化が生じるため表示むらが発生する。However, in such a liquid crystal display element in which the space between the substrates is defined by the column spacers, if the column spacers are arranged in a larger number than necessary, the elasticity between the two electrodes becomes small. When the display element is exposed to a low temperature, the substrate spacing does not follow the volume contraction of the liquid crystal, and a low-temperature bubble defect occurs. On the other hand, if the density of the column spacers is reduced, the margin of low-temperature bubble generation is increased, but loads such as pressing and deformation are applied to the liquid crystal display element,
The load applied to the column spacers during the manufacturing process of the liquid crystal display element tends to change the thickness of the column spacers, causing a change in the distance between the substrates, causing display unevenness.
【００１１】したがって、この発明の目的は、このよう
な課題を解決するものであり、低温気泡不良が発生せ
ず、製造プロセス中や外部から加わる負荷によって表示
むらの発生を防止し信頼性および表示均一性に優れる液
晶表示素子を提供することである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve such a problem, and to prevent the occurrence of a low-temperature bubble defect, prevent the occurrence of display unevenness due to a load applied during the manufacturing process or from the outside, and improve the reliability and display. An object of the present invention is to provide a liquid crystal display element having excellent uniformity.
【００１２】[0012]
【課題を解決するための手段】この目的を達成するため
にこの発明の請求項１記載の液晶表示素子は、シール材
を周囲に配置した対向する２枚の基板間に液晶を挟持し
た液晶表示素子であって、少なくとも一方の基板上の遮
光部分に、対向する基板に接触し所定の基板間隔を規定
する第一の柱スペーサを形成し、かつ、前記第一の柱ス
ペーサとは別に第二の柱スペーサを形成するとともに、
前記第二の柱スペーサの頂部と対向する基板との間に
０．２μｍ以下の隙間を形成した。In order to achieve this object, a liquid crystal display device according to the first aspect of the present invention is a liquid crystal display device in which a liquid crystal is sandwiched between two opposing substrates around which a sealing material is disposed. An element, a light-shielding portion on at least one of the substrates, a first pillar spacer that is in contact with the opposing substrate and defines a predetermined substrate interval, and a second pillar spacer separate from the first pillar spacer. While forming the pillar spacer of
A gap of 0.2 μm or less was formed between the top of the second column spacer and the opposing substrate.
【００１３】このように、少なくとも一方の基板上の遮
光部分に、対向する基板に接触し所定の基板間隔を規定
する第一の柱スペーサを形成し、かつ、第一の柱スペー
サとは別に第二の柱スペーサを形成するとともに、第二
の柱スペーサの頂部と対向する基板との間に０．２μｍ
以下の隙間を形成したので、第一の柱スペーサの本数に
より低温気泡の発生しない基板間隔を保持することがで
きる。また、液晶表示素子に押圧負荷が加わった場合、
第一の柱スペーサに加えて第二の柱スペーサが基板間隔
を保持するため、基板間隔の変動による表示むらが発生
しない。As described above, the first column spacer which contacts the opposing substrate and defines the predetermined substrate interval is formed on the light-shielding portion on at least one substrate, and the first column spacer is formed separately from the first column spacer. A second pillar spacer is formed, and a distance between the top of the second pillar spacer and the opposing substrate is 0.2 μm.
Since the following gaps are formed, it is possible to maintain a substrate interval where no low-temperature bubbles are generated by the number of first column spacers. Also, when a pressing load is applied to the liquid crystal display element,
Since the second pillar spacers maintain the substrate spacing in addition to the first pillar spacers, display unevenness due to fluctuations in the board spacing does not occur.
【００１４】請求項２記載の液晶表示素子は、請求項１
記載の液晶表示素子において、一方の基板に第一の柱ス
ペーサと第二の柱スペーサを同一材料かつ同一高さで形
成し、一方の基板と対向する基板の前記第一の柱スペー
サに相対する領域に、基板構成材料の少なくとも一層に
よって生ずる段差部を形成し、この段差部と前記第一の
柱スペーサが接触した。The liquid crystal display device according to the second aspect is the first aspect.
In the liquid crystal display element described above, a first pillar spacer and a second pillar spacer are formed on one substrate with the same material and the same height, and are opposed to the first pillar spacer on a substrate facing the one substrate. A step formed by at least one layer of the substrate constituent material was formed in the region, and the step and the first column spacer contacted each other.
【００１５】このように、一方の基板に第一の柱スペー
サと第二の柱スペーサを同一材料かつ同一高さで形成
し、一方の基板と対向する基板の第一の柱スペーサに相
対する領域に、基板構成材料の少なくとも一層によって
生ずる段差部を形成し、この段差部と第一の柱スペーサ
が接触したので、請求項１と同様に低温気泡の発生な
く、液晶表示素子への押圧負荷が加わっても表示むらの
発生しない液晶表示素子が得られる。また、基板構成材
料の形成時に段差部を形成できるので、工程数が増える
ことはない。As described above, the first pillar spacer and the second pillar spacer are formed on one substrate with the same material and at the same height, and the area opposed to the first pillar spacer of the substrate facing the one substrate is formed. A step formed by at least one layer of the material constituting the substrate, and the step and the first column spacer are in contact with each other, so that a low-temperature bubble is not generated as in claim 1, and a pressing load on the liquid crystal display element is reduced. A liquid crystal display element free from display unevenness even when added is obtained. In addition, since the step portion can be formed at the time of forming the substrate constituent material, the number of steps does not increase.
【００１６】[0016]
【発明の実施の形態】この発明の第１の実施の形態を図
１に基づいて説明する。図１はこの発明の第１の実施の
形態の液晶表示素子の構造を示す断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a sectional view showing the structure of the liquid crystal display device according to the first embodiment of the present invention.
【００１７】図１に示すように、パネル構成基板として
アクティブ素子のＴＦＴ（ＴｈｉｎＦｉｌｍ Ｔｒａｎ
ｓｉｓｔｅｒ）を有するアレイ基板１１と対向側として
カラーフィルタ基板１２を用いた。これらの基板１１，
１２の表示部のサイズは例えば対角１０インチである。
カラーフィルタ基板１１は、ガラス基板１３の上に設け
た遮光膜１４、赤緑青の色層膜１５、ならびに透明電極
１６と遮光層１４上に規則的に形成した高さの異なる柱
スペーサ１７ａ，１７ｂから構成されている。第一の柱
スペーサ１７ａは、対向するアレイ基板１１と接触し基
板間隔を決定している。そして、第二の柱スペーサ１７
ｂは、その頂部がアレイ基板１１とは接触せずに０．２
μｍ以下の非接触の間隔１８で示される隙間を有するよ
うな高さとした。一方アレイ基板１１は、ガラス基板１
９、その上に形成された信号線および走査線からなるス
イッチング素子２１および画素電極２２とから構成され
ている。アレイ基板１１およびカラーフィルタ基板１２
の相対向する面には、それぞれ配向膜２３がそれぞれ形
成されている。そして、基板１１，１２間には液晶２４
が充填されており、その周辺部は、シール材２５で固着
されている。As shown in FIG. 1, a TFT (Thin Film Tran) of an active element is used as a panel constituting substrate.
A color filter substrate 12 was used as an opposite side to the array substrate 11 having a sister. These substrates 11,
The size of the 12 display units is, for example, 10 inches diagonally.
The color filter substrate 11 includes a light shielding film 14 provided on a glass substrate 13, a red-green-blue color layer film 15, and transparent electrodes 16 and pillar spacers 17 a and 17 b having different heights formed regularly on the light shielding layer 14. It is composed of The first column spacer 17a is in contact with the opposing array substrate 11 to determine the substrate interval. And the second pillar spacer 17
b is 0.2 when the top is not in contact with the array substrate 11.
The height was set so as to have a gap indicated by a non-contact interval 18 of μm or less. On the other hand, the array substrate 11 is a glass substrate 1
9, a switching element 21 formed of a signal line and a scanning line and a pixel electrode 22 formed thereon. Array substrate 11 and color filter substrate 12
The alignment films 23 are respectively formed on the surfaces facing each other. A liquid crystal 24 is provided between the substrates 11 and 12.
, And the periphery thereof is fixed with a seal material 25.
【００１８】図１に示した液晶表示素子の製造工程は、
まず、カラーフィルタ基板１２として、ガラス基板１３
上に遮光層を基板全面に形成した後、一般的なフォトリ
ソ法により、所定パターン形状の遮光層１４をパターニ
ングした。遮光層膜としては、一般的に黒色樹脂または
金属膜が使われている。この実施の形態では、酸化クロ
ム膜を用いた。次に、赤青緑の色層１５をそれぞれ顔料
レジスト塗布、露光、現像によって所定パターン形状に
形成した。次に、基板上にメタルマスクをセットした状
態でＩＴＯスパッタ装置により所望の透明電極１６を形
成した。次に、樹脂膜を塗布後、露光現像をすることに
より第一の柱スペーサ１７ａを４．５μｍとなるように
形成した。そして最後に、同様な方法で第二の柱スペー
サ１７ｂを４．３μｍとなるように形成した。第一の柱
スぺーサ層１７ａの高さは、液晶表示素子のの基板間隔
設計に応じて決定すればよいが、今回は、４．５μｍの
高さに設計し、第二の柱スペーサ１７ｂを４．３μｍと
した。The manufacturing process of the liquid crystal display device shown in FIG.
First, as a color filter substrate 12, a glass substrate 13 is used.
After a light-shielding layer was formed on the entire surface of the substrate, the light-shielding layer 14 having a predetermined pattern was patterned by a general photolithography method. Generally, a black resin or a metal film is used as the light shielding layer film. In this embodiment, a chromium oxide film is used. Next, the red, blue, and green color layers 15 were formed in a predetermined pattern shape by applying, exposing, and developing a pigment resist, respectively. Next, a desired transparent electrode 16 was formed by an ITO sputtering apparatus with the metal mask set on the substrate. Next, after applying a resin film, the first pillar spacer 17a was formed to have a thickness of 4.5 μm by performing exposure and development. Finally, a second pillar spacer 17b was formed to have a thickness of 4.3 μm by the same method. The height of the first pillar spacer layer 17a may be determined according to the substrate spacing design of the liquid crystal display element, but this time, the height is designed to be 4.5 μm, and the second pillar spacer 17b Was set to 4.3 μm.
【００１９】上記のような膜構成の柱スペーサ付きカラ
ーフィルタ基板１１とスイッチング素子および電極を形
成したアレイ基板１２に配向膜材料を印刷し配向処理を
行った後、封止材料として熱硬化型液晶表示素子用エポ
キシ接着剤を隔壁層を囲むように液晶注入口を有するよ
うにスクリーン印刷し、対向する電極基板と貼り合わ
せ、空の液晶素子を形成し、エポキシ接着剤を加熱硬化
させた。この空の液晶表示素子に真空注入法によって液
晶を注入し、注入口を光硬化型接着剤によって封止し、
対向する２枚の基板間１１，１２に液晶を挟持した液晶
表示素子とした。After an alignment film material is printed on the color filter substrate 11 having column spacers having the above-described film configuration and the array substrate 12 on which the switching elements and the electrodes are formed, and an alignment process is performed, a thermosetting liquid crystal is used as a sealing material. The display element epoxy adhesive was screen-printed so as to have a liquid crystal injection port so as to surround the partition layer, and was bonded to an opposing electrode substrate to form an empty liquid crystal element, and the epoxy adhesive was cured by heating. Liquid crystal is injected into this empty liquid crystal display element by a vacuum injection method, and the injection port is sealed with a photo-curing adhesive,
A liquid crystal display device in which liquid crystal was sandwiched between two opposing substrates 11 and 12 was provided.
【００２０】ここで、図４に示した従来の柱スペーサ方
式のように全ての柱スペーサが液晶表示素子の基板間隔
を決定する場合、低温（−２０℃、１００ｈ放置）状態
では、液晶の体積収縮に基板間隔の変動が追従せずに、
液晶表示素子内に真空気泡が発生した。この気泡対策で
スペーサの数を１／２に減らすことで低温での気泡発生
は抑制できたが、基板間隔を決定するスペーサの減少に
よって、製造プロセスによる柱スペーサおよび完成した
液晶表示素子に応力（２ｋｇ／ｃｍ2 以上）が加わるこ
とによって、基板間隔の変動が発生し表示むらが発生し
た。Here, when all the column spacers determine the substrate spacing of the liquid crystal display element as in the conventional column spacer system shown in FIG. 4, the volume of the liquid crystal is low at a low temperature (−20 ° C., left for 100 hours). The fluctuation of the board interval does not follow the shrinkage,
Vacuum bubbles were generated in the liquid crystal display device. By reducing the number of spacers to half by this countermeasure against bubbles, the generation of bubbles at low temperatures could be suppressed. However, due to the reduction in the spacers that determine the distance between the substrates, the stress ( (2 kg / cm 2 or more), the substrate spacing fluctuated and display unevenness occurred.
【００２１】この実施の形態の液晶表示素子では、低温
気泡の発生しない基板間隔を保持する第一の柱スペーサ
１７ａの数で第二の柱スペーサ１７ｂが液晶表示素子に
負荷が加わった場合のみ、基板間隔を保持するために表
示むらは発生しなかった。一般的な液晶表示素子は０．
２μｍの基板間隔の変動が表示むらになるため、第二の
柱スペーサ１７ｂの基板との間隔１８は０．２μｍ以下
が望ましい。In the liquid crystal display device according to this embodiment, the number of the first column spacers 17a that keeps the space between the substrates where no low-temperature bubbles are generated is equal to the number of the second column spacers 17b, and only when the load is applied to the liquid crystal display device. Display unevenness did not occur to maintain the substrate interval. A general liquid crystal display device has a.
Since the fluctuation of the substrate interval of 2 μm causes display unevenness, the interval 18 between the second pillar spacer 17b and the substrate is preferably 0.2 μm or less.
【００２２】この発明の第２の実施の形態を図２に基づ
いて説明する。図２はこの発明の第２の実施の形態の液
晶表示素子の構造を示す断面図である。A second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a sectional view showing a structure of a liquid crystal display device according to a second embodiment of the present invention.
【００２３】図２に示すように、第１の実施の形態と同
様にパネル構成基板としてアレイ基板１１とカラーフィ
ルタ基板１２が用いられる。また、一方の基板に第一の
柱スペーサ１７ａと第二の柱スペーサ１７ｂを同一材料
かつ同一高さで形成し、一方の基板と対向する基板の第
一の柱スペーサ１７ａに相対する領域に、基板構成材料
の少なくとも一層によって生ずる段差部を形成し、この
段差部と第一の柱スペーサ１７ａが接触している。この
場合、カラーフィルタ基板１２に同一高さの柱スペーサ
１７を形成し、相対するアレイ基板１１において、アレ
イ基板１１を構成する電極材料、配線材料および絶縁材
料の積層層２８を第一の柱スペーサ１７ａと相対する位
置にパターニング形成した。As shown in FIG. 2, as in the first embodiment, an array substrate 11 and a color filter substrate 12 are used as panel constituting substrates. Further, a first pillar spacer 17a and a second pillar spacer 17b are formed on one substrate with the same material and the same height, and in a region opposed to the first pillar spacer 17a on a substrate facing the one substrate, A step formed by at least one layer of the substrate forming material is formed, and the step and the first column spacer 17a are in contact with each other. In this case, the column spacers 17 having the same height are formed on the color filter substrate 12, and the laminated layers 28 of the electrode material, the wiring material, and the insulating material forming the array substrate 11 are formed on the opposing array substrates 11. Patterning was performed at a position opposite to 17a.
【００２４】図２に示した液晶表示素子の製造工程は、
まず、カラーフィルタ基板１２として、ガラス基板１３
上に遮光層を基板全面に形成した後、一般的なフォトリ
ソ法により、所定パターン形状の遮光層１４をパターニ
ングした。遮光層膜としては、一般的に黒色樹脂または
金属膜が使われている。この実施の形態では、酸化クロ
ム膜を用いた。次に、赤青緑の色層１５をそれぞれ顔料
レジスト塗布、露光、現像によって所定パターン形状に
形成した。次に、基板上にメタルマスクをセットした状
態でＩＴＯスパッタ装置により所望の透明電極１６を形
成した。次に、樹脂膜を塗布後、露光現像をすることに
より柱スペーサ１７を４．３μｍとなるように形成し
た。第一の柱スぺーサ層１７ａの高さは、液晶表示素子
の基板間隔設計に応じて決定すればよいが、今回は、
４．３μｍの高さに設計した。そして、アレイ基板１１
の形成に際しては、ガラス基板１９上に、スイッチング
素子２１を、一般的な半導体薄膜成膜と、絶縁膜成膜と
フォトリソ法によるエッチングとを繰り返すことにより
形成する。この時、絶縁材料としてＳｉＮX の積層層２
８を第一の柱スペーサ１７ａと相対する位置に０．２μ
ｍの厚みでパターニング形成した。The manufacturing process of the liquid crystal display device shown in FIG.
First, as a color filter substrate 12, a glass substrate 13 is used.
After a light-shielding layer was formed on the entire surface of the substrate, the light-shielding layer 14 having a predetermined pattern was patterned by a general photolithography method. Generally, a black resin or a metal film is used as the light shielding layer film. In this embodiment, a chromium oxide film is used. Next, the red, blue, and green color layers 15 were formed in a predetermined pattern shape by coating, exposing, and developing a pigment resist. Next, a desired transparent electrode 16 was formed by an ITO sputtering apparatus with the metal mask set on the substrate. Next, after applying a resin film, exposure and development were performed to form column spacers 17 to have a thickness of 4.3 μm. The height of the first pillar spacer layer 17a may be determined according to the substrate spacing design of the liquid crystal display element.
It was designed to have a height of 4.3 μm. Then, the array substrate 11
At the time of forming, the switching element 21 is formed on the glass substrate 19 by repeating the formation of a general semiconductor thin film, the formation of an insulating film, and the etching by the photolithography method. At this time, the laminated layer 2 of SiN X as an insulating material is used.
8 at a position opposed to the first pillar spacer 17a by 0.2 μm.
The pattern was formed with a thickness of m.
【００２５】上記のような柱スペーサ付きカラーフィル
タ基板１１とスイッチング素子および電極を形成したア
レイ基板１２に配向膜材料を印刷し配向処理を行った
後、封止材料として熱硬化型液晶表示素子用エポキシ接
着剤を隔壁層を囲むように液晶注入口を有するようにス
クリーン印刷し、対向する電極基板と貼り合わせ、空の
液晶素子を形成し、エポキシ接着剤を加熱硬化させた。
この空の液晶表示素子に真空注入法によって液晶を注入
し、注入口を光硬化型接着剤によって封止し、液晶表示
素子とした。After the alignment film material is printed on the color filter substrate 11 with the column spacers and the array substrate 12 on which the switching elements and the electrodes are formed and subjected to an alignment treatment, a sealing material for a thermosetting liquid crystal display element is used. An epoxy adhesive was screen-printed so as to have a liquid crystal injection port so as to surround the partition layer, and was bonded to the opposing electrode substrate to form an empty liquid crystal element, and the epoxy adhesive was cured by heating.
Liquid crystal was injected into the empty liquid crystal display element by a vacuum injection method, and the injection port was sealed with a photocurable adhesive to obtain a liquid crystal display element.
【００２６】この実施の形態にて完成した液晶表示素子
においても第１の実施の形態と同様に、低温気泡の発生
なく、液晶表示素子への押圧負荷が加わっても、表示む
らの発生しない液晶表示素子が得られた。In the liquid crystal display device completed in this embodiment, similarly to the first embodiment, no liquid crystal bubbles are generated, and even if a pressing load is applied to the liquid crystal display device, the liquid crystal display does not have uneven display. A display element was obtained.
【００２７】なお、この実施の形態において、カラーフ
ィルタ基板にスペーサを形成したが、アレイ基板に同様
にスペーサを形成した場合も同様な結果が得られた。ま
た、ＴＮ（Ｔｗｉｓｔｅｄ Ｎｅｍａｔｉｃ）型液晶表
示素子やＳＴＮ（ＳｕｐｅｒＴｗｉｓｔｅｄ Ｎｅｍａ
ｔｉｃ）型液晶表示素子においても同様な結果が得られ
た。In this embodiment, the spacer was formed on the color filter substrate. However, similar results were obtained when the spacer was formed on the array substrate. In addition, a TN (Twisted Nematic) type liquid crystal display element or an STN (Super Twisted Nema)
A similar result was obtained with the tic) type liquid crystal display element.
【００２８】[0028]
【発明の効果】この発明の請求項１記載の液晶表示素子
によれば、少なくとも一方の基板上の遮光部分に、対向
する基板に接触し所定の基板間隔を規定する第一の柱ス
ペーサを形成し、かつ、第一の柱スペーサとは別に第二
の柱スペーサを形成するとともに、第二の柱スペーサの
頂部と対向する基板との間に０．２μｍ以下の隙間を形
成したので、第一の柱スペーサの本数により低温気泡の
発生しない基板間隔を保持することができる。また、液
晶表示素子に押圧負荷が加わった場合、第一の柱スペー
サに加えて第二の柱スペーサが基板間隔を保持するた
め、基板間隔の変動による表示むらが発生しない。According to the liquid crystal display device of the first aspect of the present invention, the first column spacer that contacts the opposing substrate and defines a predetermined substrate interval is formed on at least one of the light-shielding portions. In addition, a second pillar spacer was formed separately from the first pillar spacer, and a gap of 0.2 μm or less was formed between the top of the second pillar spacer and the opposing substrate. The number of the column spacers can keep the substrate interval at which low-temperature bubbles do not occur. Further, when a pressing load is applied to the liquid crystal display element, the second column spacers in addition to the first column spacers maintain the substrate interval, so that display unevenness due to variations in the substrate interval does not occur.
【００２９】また、柱スペーサにより、従来のビーズで
の液晶表示素子の課題であったビーズの凝集による点欠
陥、ビーズによる光抜けによるコントラスト低下および
ビーズの散布むらによるギャップむらが改善できる。Further, the column spacer can improve the point defects due to the aggregation of beads, the decrease in contrast due to light leakage due to beads, and the gap unevenness due to uneven dispersion of beads, which are problems of the conventional liquid crystal display device using beads.
【００３０】請求項２では、一方の基板に第一の柱スペ
ーサと第二の柱スペーサを同一材料かつ同一高さで形成
し、一方の基板と対向する基板の第一の柱スペーサに相
対する領域に、基板構成材料の少なくとも一層によって
生ずる段差部を形成し、この段差部と第一の柱スペーサ
が接触したので、請求項１と同様に低温気泡の発生な
く、液晶表示素子への押圧負荷が加わっても表示むらの
発生しない液晶表示素子が得られる。また、基板構成材
料の形成時に段差部を形成できるので、工程数が増える
ことはない。According to the present invention, the first pillar spacer and the second pillar spacer are formed on one substrate with the same material and the same height, and are opposed to the first pillar spacer on the substrate facing the one substrate. A step formed by at least one layer of the substrate constituting material is formed in the region, and the step and the first pillar spacer are in contact with each other. , A liquid crystal display element free from display unevenness is obtained. In addition, since the step portion can be formed at the time of forming the substrate constituent material, the number of steps does not increase.
【図１】この発明の第１の実施の形態の液晶表示装置の
断面図FIG. 1 is a sectional view of a liquid crystal display device according to a first embodiment of the present invention.
【図２】この発明の第２の実施の形態の液晶表示装置の
断面図FIG. 2 is a sectional view of a liquid crystal display device according to a second embodiment of the present invention.
【図３】従来例の液晶表示装置の断面図FIG. 3 is a sectional view of a conventional liquid crystal display device.
【図４】従来例の液晶表示装置の断面図FIG. 4 is a sectional view of a conventional liquid crystal display device.
１１ アレイ基板 １２ カラーフィルタ基板 １３ ガラス基板 １４ 遮光層 １５ 色層 １６ 透明電極 １７ａ 第一の柱スペーサ １７ｂ 第二の柱スペーサ １８ 非接触の間隔 １９ ガラス基板 ２１ スイッチング素子 ２２ 画素電極 ２３ 配向膜 ２４ 液晶 ２５ シール材 ２６ ビーズ ２７ 表示領域 ２８ アレイ基板構成材料による積層層 Reference Signs List 11 array substrate 12 color filter substrate 13 glass substrate 14 light shielding layer 15 color layer 16 transparent electrode 17a first column spacer 17b second column spacer 18 non-contact interval 19 glass substrate 21 switching element 22 pixel electrode 23 alignment film 24 liquid crystal Reference Signs List 25 sealing material 26 beads 27 display area 28 laminated layer composed of array substrate constituent material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 井上 浩治 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 炭田 祉朗 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 2H089 LA09 NA14 NA37 QA14 TA12 TA13 2H091 FA02Y FA34Y GA08 GA17 LA16 LA20 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Koji Inoue 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. F-term (reference) 2H089 LA09 NA14 NA37 QA14 TA12 TA13 2H091 FA02Y FA34Y GA08 GA17 LA16 LA20
Claims (2)
の基板間に液晶を挟持した液晶表示素子であって、少な
くとも一方の基板上の遮光部分に、対向する基板に接触
し所定の基板間隔を規定する第一の柱スペーサを形成
し、かつ、前記第一の柱スペーサとは別に第二の柱スペ
ーサを形成するとともに、前記第二の柱スペーサの頂部
と対向する基板との間に０．２μｍ以下の隙間を形成し
たことを特徴とする液晶表示素子。1. A liquid crystal display device comprising a liquid crystal sandwiched between two opposing substrates having a sealing material disposed therearound, wherein at least one of the light-shielding portions is in contact with the opposing substrate and a predetermined substrate is in contact with the opposing substrate. Form a first pillar spacer that defines the spacing, and, while forming a second pillar spacer separately from the first pillar spacer, between the top of the second pillar spacer and the opposing substrate. A liquid crystal display device having a gap of 0.2 μm or less.
柱スペーサを同一材料かつ同一高さで形成し、一方の基
板と対向する基板の前記第一の柱スペーサに相対する領
域に、基板構成材料の少なくとも一層によって生ずる段
差部を形成し、この段差部と前記第一の柱スペーサが接
触した請求項１記載の液晶表示素子。2. A first pillar spacer and a second pillar spacer are formed on one substrate with the same material and the same height, and the first pillar spacer and the second pillar spacer are formed in a region facing the first pillar spacer on a substrate facing the one substrate. 2. The liquid crystal display device according to claim 1, wherein a step portion formed by at least one layer of the substrate forming material is formed, and the step portion contacts the first column spacer.
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|---|---|---|---|
| JP2001146644A JP2002341354A (en) | 2001-05-16 | 2001-05-16 | Liquid crystal display element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001146644A JP2002341354A (en) | 2001-05-16 | 2001-05-16 | Liquid crystal display element |
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|---|---|
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