JP2002357832A - Spacer for liquid crystal display device - Google Patents
Spacer for liquid crystal display deviceInfo
- Publication number
- JP2002357832A JP2002357832A JP2001164627A JP2001164627A JP2002357832A JP 2002357832 A JP2002357832 A JP 2002357832A JP 2001164627 A JP2001164627 A JP 2001164627A JP 2001164627 A JP2001164627 A JP 2001164627A JP 2002357832 A JP2002357832 A JP 2002357832A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- spacer
- display device
- crystal display
- meth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 58
- 125000006850 spacer group Chemical group 0.000 title claims abstract description 38
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 15
- 125000004432 carbon atom Chemical group C* 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 26
- 239000000178 monomer Substances 0.000 description 15
- 239000002245 particle Substances 0.000 description 14
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 description 3
- RUMACXVDVNRZJZ-UHFFFAOYSA-N 2-methylpropyl 2-methylprop-2-enoate Chemical compound CC(C)COC(=O)C(C)=C RUMACXVDVNRZJZ-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- -1 t-butylphenyl group Chemical group 0.000 description 3
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000001023 inorganic pigment Substances 0.000 description 2
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000012860 organic pigment Substances 0.000 description 2
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 description 1
- 150000000703 Cerium Chemical class 0.000 description 1
- 239000004641 Diallyl-phthalate Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 239000001000 anthraquinone dye Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- XMPZTFVPEKAKFH-UHFFFAOYSA-P ceric ammonium nitrate Chemical compound [NH4+].[NH4+].[Ce+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O XMPZTFVPEKAKFH-UHFFFAOYSA-P 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000010559 graft polymerization reaction Methods 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229940059574 pentaerithrityl Drugs 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000001007 phthalocyanine dye Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- GRPURDFRFHUDSP-UHFFFAOYSA-N tris(prop-2-enyl) benzene-1,2,4-tricarboxylate Chemical compound C=CCOC(=O)C1=CC=C(C(=O)OCC=C)C(C(=O)OCC=C)=C1 GRPURDFRFHUDSP-UHFFFAOYSA-N 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、負の誘電率異方性
を有する液晶を、垂直配向性の配向膜を用いてパネル面
に対して略垂直配向させ、電圧印加時に液晶をパネル面
に対して水平方向に傾けることにより駆動させる方式
（Ｖｅｒｔｉｃａｌｌｙ Ａｌｉｇｎｅｄ ｍｏｄｅ、
以下ＶＡモードという）の液晶表示装置及びこれに用い
るスペーサに関するもので、液晶パネルの光遮断時にお
けるスペーサ周囲の光抜けを改善し、パネル表示のコン
トラストを向上させることができる液晶表示装置用スペ
ーサ及び液晶表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for aligning a liquid crystal having a negative dielectric anisotropy substantially perpendicularly to a panel surface by using a vertical alignment film, and applying the liquid crystal to the panel surface when a voltage is applied. In contrast, a method of driving by tilting horizontally (Vertically Aligned mode,
The present invention relates to a liquid crystal display device of a VA mode) and a spacer used in the liquid crystal display device, and a spacer for a liquid crystal display device which can improve light leakage around the spacer when light of a liquid crystal panel is cut off and can improve the contrast of panel display. The present invention relates to a liquid crystal display device.
【０００２】[0002]
【従来の技術】従来の液晶表示装置では、誘電率異方性
が正の液晶と水平配向性の配向膜を用いることで、電圧
無印加時はパネル面に液晶が水平方向に配向し、電圧印
加時に液晶を垂直方向に傾けて駆動させている。一方、
最近従来の液晶表示装置の欠点である視野角依存性を解
消し、またパネルのコントラストを上昇させる目的で、
ＶＡモードの液晶表示装置が使われるようになってき
た。このＶＡモードを用いた液晶パネルでは、スペーサ
周囲の光抜けが発生し、パネルのコントラストが著しく
低下するという問題が発生していた。2. Description of the Related Art In a conventional liquid crystal display device, a liquid crystal having a positive dielectric anisotropy and a horizontal alignment film are used. At the time of application, the liquid crystal is driven while being tilted in the vertical direction. on the other hand,
In order to eliminate the viewing angle dependency, which is a disadvantage of the conventional liquid crystal display device recently, and to increase the contrast of the panel,
VA mode liquid crystal display devices have been used. In the liquid crystal panel using the VA mode, light leakage around the spacer occurs, causing a problem that the contrast of the panel is significantly reduced.
【０００３】従来のＴＮモードの液晶表示装置では、ス
ペーサ表面に液晶分子を垂直に配向させることで、スペ
ーサ周辺の光り抜け防止を図り、パネル表示のコントラ
ストを向上させていた。従って、スペーサの表面には、
炭素数が１２以上のアルキル基を有する表面処理を行っ
ていた。しかしながら、ＶＡモードの液晶表示装置は従
来のＴＮモードの液晶表示装置とは、液晶及び配向膜が
異なり、液晶分子の配向状態が異なるので、従来のスペ
ーサではコントラスト向上には効果がない。In a conventional TN mode liquid crystal display device, liquid crystal molecules are vertically aligned on the spacer surface to prevent light leakage around the spacer and improve the contrast of panel display. Therefore, on the surface of the spacer,
A surface treatment having an alkyl group having 12 or more carbon atoms has been performed. However, the VA mode liquid crystal display device is different from the conventional TN mode liquid crystal display device in that the liquid crystal and the alignment film are different and the alignment state of the liquid crystal molecules is different, so that the conventional spacer has no effect on improving the contrast.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記現状に
鑑み、ＶＡモードの液晶表示装置に用いて、液晶パネル
の光遮断時におけるスペーサ周囲の光抜けを改善し、高
いコントラストを実現することができる液晶表示装置用
スペーサ及び液晶表示装置を提供することを目的とす
る。SUMMARY OF THE INVENTION In view of the above situation, the present invention is to improve the light leakage around the spacer when the liquid crystal panel is blocked from light and realize a high contrast by using the liquid crystal display device of the VA mode. It is an object of the present invention to provide a liquid crystal display device spacer and a liquid crystal display device that can be used.
【０００５】[0005]
【課題を解決するための手段】本発明者は、上記課題を
解決するために鋭意検討を重ねた結果、ＶＡモードの液
晶表示装置において、スペーサ表面の配向規制力が水平
配向と垂直配向との中間程度にすると、著しくコントラ
ストが向上することを見出し、本発明の完成に至った。The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, in a VA-mode liquid crystal display device, the alignment regulating force on the spacer surface was determined to be between the horizontal alignment and the vertical alignment. It was found that the contrast was significantly improved at an intermediate level, and the present invention was completed.
【０００６】本発明は、ＶＡモードの液晶表示装置に用
いられる液晶表示装置用スペーサであって、その表面に
炭素数が１０以下のアルキル基のみを２種類以上有する
液晶表示装置用スペーサである。以下に本発明を詳述す
る。The present invention relates to a spacer for a liquid crystal display device used for a VA mode liquid crystal display device, which has two or more types of only alkyl groups having 10 or less carbon atoms on the surface thereof. Hereinafter, the present invention will be described in detail.
【０００７】本発明の液晶表示装置用スペーサに用いら
れる炭素数が１０以下のアルキル基としては、具体的に
は、メチル基、エチル基、プロピル基、ブチル基、ペン
チル基、ヘキシル基、ヘプチル基、オクチル基、ノニル
基、デシル基、イソブチル基、ｔ−ブチル基、フェニル
基、ｔ−ブチルフェニル基等が挙げられる。これらのア
ルキル基の好ましい組み合わせとしては特に限定され
ず、例えば、メチル基とイソブチル基、メチル基とブチ
ル基、メチル基とヘキシル基等が好ましい。As the alkyl group having 10 or less carbon atoms used in the spacer for a liquid crystal display device of the present invention, specifically, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group Octyl group, nonyl group, decyl group, isobutyl group, t-butyl group, phenyl group, t-butylphenyl group and the like. Preferred combinations of these alkyl groups are not particularly limited, and for example, a methyl group and an isobutyl group, a methyl group and a butyl group, a methyl group and a hexyl group, and the like are preferable.
【０００８】一般に表面処理スペーサの表面に存在す
る、アルキル基の長さが短い場合は、スペーサ表面は水
平配向規制力ガ強くなり、アルキル基の長さが長い場合
は、垂直配向規制力が強くなる。通常は、数種類のアル
キル基を組み合わせて、それぞれのモードに応じた最適
な表面組成を形成している。ＶＡモードにおいては、表
面の配向規制力が垂直と水平の中間程度が好ましいた
め、短鎖アルキルと中鎖アルキル（炭素数１０以下）の
組み合わせが適切なスペーサの表面となる。In general, when the length of the alkyl group present on the surface of the surface-treated spacer is short, the spacer surface has a strong horizontal alignment regulating force, and when the length of the alkyl group is long, the vertical alignment regulating force is strong. Become. Usually, several types of alkyl groups are combined to form an optimum surface composition according to each mode. In the VA mode, since the alignment control force of the surface is preferably intermediate between the vertical and horizontal directions, a combination of a short-chain alkyl and a medium-chain alkyl (having 10 or less carbon atoms) provides an appropriate spacer surface.
【０００９】本発明の液晶表示装置用スペーサは基材粒
子の表面に炭素数が１０以下のアルキル基を２種類以上
導入することにより得られる。上記基材粒子としては特
に限定されず、無機材料であっても、有機材料であって
もよい。上記無機材料としては特に限定されず、例え
ば、珪酸ガラス、ホウ珪酸ガラス、鉛ガラス、曹達石灰
ガラス、アルミナ、アルミナシリケート等が挙げられ
る。The spacer for a liquid crystal display of the present invention can be obtained by introducing two or more kinds of alkyl groups having 10 or less carbon atoms into the surface of the base particles. The base particles are not particularly limited, and may be an inorganic material or an organic material. The inorganic material is not particularly limited, and examples thereof include silicate glass, borosilicate glass, lead glass, soda-lime glass, alumina, and alumina silicate.
【００１０】しかし、基材粒子の材料として無機材料を
使用する場合、液晶と熱膨張率が大きく異なるため、温
度変化に追従しきれず低温発泡等の不良を生じることが
ある。このため、液晶と熱膨張率が大きく変わらない有
機材料を用いることが好ましい。However, when an inorganic material is used as the material of the base particles, the coefficient of thermal expansion is greatly different from that of the liquid crystal. Therefore, it is preferable to use an organic material whose coefficient of thermal expansion does not largely differ from that of the liquid crystal.
【００１１】上記有機材料としては特に限定されず、例
えば、エポキシ樹脂、フェノール樹脂、メラミン樹脂、
不飽和ポリエステル樹脂等が挙げられる。しかしなが
ら、その機械的強度を考えれば、エチレン性不飽和基を
有する単量体を重合させて得られる基材粒子であって、
そのエチレン性不飽和基を有する重合性単量体は、少な
くとも２０重量％が、２個以上のエチレン性不飽和基を
有する重合性単量体であることが好ましい。The organic material is not particularly restricted but includes, for example, epoxy resin, phenol resin, melamine resin,
And unsaturated polyester resins. However, in view of its mechanical strength, the base particles obtained by polymerizing a monomer having an ethylenically unsaturated group,
It is preferable that at least 20% by weight of the polymerizable monomer having an ethylenically unsaturated group is a polymerizable monomer having two or more ethylenically unsaturated groups.
【００１２】上記２個以上のエチレン性不飽和基を有す
る重合性単量体としては特に限定されず、例えば、テト
ラメチロールメタンテトラ（メタ）アクリレート、テト
ラメチロールメタントリ（メタ）アクリレート、テトラ
メチロールメタンジ（メタ）アクリレート、トリメチロ
ールプロパントリ（メタ）アクリレート、ジペンタエリ
スリトールヘキサ（メタ）アクリレート、ジペンタエリ
スリトールペンタ（メタ）アクリレート、グリセロール
トリ（メタ）アクリレート、グリセロールジ（メタ）ア
クリレート、ポリエチレングリコールジ（メタ）アクリ
レート、ポリプロピレングリコールジ（メタ）アクリレ
ート等の多官能（メタ）アクリレート類；トリアリル
（イソ）シアヌレート、トリアリルトリメリテート等；
ジビニルベンゼン、ジアリルフタレート、ジアリルアク
リルアミド等が挙げられる。The polymerizable monomer having two or more ethylenically unsaturated groups is not particularly restricted but includes, for example, tetramethylolmethanetetra (meth) acrylate, tetramethylolmethanetri (meth) acrylate, tetramethylolmethane Di (meth) acrylate, trimethylolpropane tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, glycerol tri (meth) acrylate, glycerol di (meth) acrylate, polyethylene glycol di Polyfunctional (meth) acrylates such as (meth) acrylate and polypropylene glycol di (meth) acrylate; triallyl (iso) cyanurate, triallyl trimellitate and the like;
Examples include divinylbenzene, diallyl phthalate, diallyl acrylamide and the like.
【００１３】上記基材粒子は、２個以上のエチレン性不
飽和基を有する重合性単量体のみからなるものであって
もよく、２個以上のエチレン性不飽和基を有する重合性
単量体とその他のエチレン性不飽和基を有する重合性単
量体とを共重合して得られるものであってもよい。上記
その他の重合性単量体としては特に限定されず、例え
ば、スチレン、α−メチルスチレン等のスチレン系単量
体、メチル（メタ）アクリレート等の（メタ）アクリレ
ート類等が挙げられる。上記２個以上のエチレン性不飽
和基を有する重合性単量体及びその他のエチレン性不飽
和基を有する重合性単量体は単独で用いてもよく、２種
類以上を併用してもよい。The base particles may be composed of only a polymerizable monomer having two or more ethylenically unsaturated groups, or may be a polymerizable monomer having two or more ethylenically unsaturated groups. It may be obtained by copolymerizing the polymer with another polymerizable monomer having an ethylenically unsaturated group. The other polymerizable monomers are not particularly limited, and include, for example, styrene monomers such as styrene and α-methylstyrene, and (meth) acrylates such as methyl (meth) acrylate. The polymerizable monomer having two or more ethylenically unsaturated groups and the other polymerizable monomer having an ethylenically unsaturated group may be used alone or in combination of two or more.
【００１４】上記基材粒子は無色透明であってもよく、
必要に応じて、公知の方法により着色されていてもよ
い。着色に用いられる色素、顔料等は、市販されている
通常の色素や、有機顔料、無機顔料を用いることができ
る。上記有機顔料としては、例えば、アニリンブラッ
ク、フタロシアニン系色素、アントラキノン系色素、ジ
アゾ系色素等が挙げられ、無機顔料としては、例えば、
カーボンブラック、表面修飾被覆体、金属塩類等が挙げ
られる。これらは、単独で用いてもよく、２種類以上を
併用してもよい。The base particles may be colorless and transparent,
If necessary, it may be colored by a known method. Commercially available ordinary dyes, organic pigments and inorganic pigments can be used as the dyes and pigments used for coloring. Examples of the organic pigment include, for example, aniline black, a phthalocyanine dye, an anthraquinone dye, a diazo dye, and the like.As the inorganic pigment, for example,
Examples include carbon black, surface-modified coatings, and metal salts. These may be used alone or in combination of two or more.
【００１５】上記基材粒子の表面に炭素数が１０以下の
アルキル基を導入する方法としては、例えば、還元性基
を有する基材粒子表面に炭素数が１０以下のアルキル基
を有する重合性単量体を含浸した後、セリウム塩、過硫
酸塩等の酸化剤を反応させることにより上記基材粒子の
表面にラジカルを発生させ、該ラジカルを起点としてス
ペーサ表面にグラフト重合層を形成する方法等が挙げら
れる。As a method for introducing an alkyl group having 10 or less carbon atoms into the surface of the base particles, for example, a polymerizable monomer having an alkyl group having 10 or less carbon atoms on the surface of the base particles having a reducing group is used. After impregnating the monomer, a radical is generated on the surface of the base particles by reacting with an oxidizing agent such as a cerium salt or a persulfate, and the radical is used as a starting point to form a graft polymerization layer on the spacer surface. Is mentioned.
【００１６】上記炭素数が１０以下のアルキル基を有す
る重合性単量体としては特に限定されず、例えば、メチ
ル（メタ）アクリレート、エチル（メタ）アクリレー
ト、プロピル（メタ）アクリレート、ブチル（メタ）ア
クリレート、ペンチル（メタ）アクリレート、ヘキシル
（メタ）アクリレート、ヘプチル（メタ）アクリレー
ト、オクチル（メタ）アクリレート、ノニル（メタ）ア
クリレート、デシル（メタ）アクリレート、イソブチル
（メタ）アクリレート、ｔ−ブチル（メタ）アクリレー
ト、フェニル（メタ）アクリレート、ｔ−ブチルフェニ
ル（メタ）アクリレート等が挙げられる。これらの重合
性単量体は、単独で用いてもよく、２種類以上併用して
もよい。The polymerizable monomer having an alkyl group having 10 or less carbon atoms is not particularly limited. Examples thereof include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, and butyl (meth) acrylate. Acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) Acrylate, phenyl (meth) acrylate, t-butylphenyl (meth) acrylate and the like can be mentioned. These polymerizable monomers may be used alone or in combination of two or more.
【００１７】本発明の液晶表示装置用スペーサの粒径
は、１〜１０μｍであることが好ましい。本発明の液晶
表示装置用スペーサの標準偏差はＣＶ値で１０％以下で
あることが好ましく、より好ましくは５％以下である。The particle size of the spacer for a liquid crystal display device of the present invention is preferably 1 to 10 μm. The standard deviation of the spacer for a liquid crystal display device of the present invention is preferably 10% or less in CV value, more preferably 5% or less.
【００１８】本発明の液晶表示装置用スペーサは、この
スペーサを介して平行に対をなして配置されている少な
くとも一つが透明な２枚の基板と、その基板上に形成さ
れた電極と、該電極上に形成された垂直配向性能を有す
る配向膜とを有し、これら基板間に負の誘電率異方性を
有する液晶を挟持してなり、この液晶を、垂直配向性の
配向膜を用いてパネル面に対して略垂直配向させ、電圧
印加時に液晶をパネル面に対して水平方向に傾けること
により駆動させる、いわゆるＶＡモード方式の液晶表示
装置に用いられる。このような液晶表示装置もまた、本
発明の１つである。The spacer for a liquid crystal display device according to the present invention comprises two substrates, at least one of which is transparent and arranged in parallel via the spacer, an electrode formed on the substrate, An alignment film having vertical alignment performance formed on an electrode, and a liquid crystal having a negative dielectric anisotropy is sandwiched between these substrates, and the liquid crystal is formed using a vertical alignment film. The liquid crystal display device is of a so-called VA mode type, in which the liquid crystal is driven by tilting the liquid crystal horizontally with respect to the panel surface when a voltage is applied. Such a liquid crystal display device is also one of the present invention.
【００１９】[0019]
【実施例】以下に実施例を掲げて本発明を更に詳しく説
明するが、本発明はこれら実施例のみに限定されるもの
ではない。The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
【００２０】（実施例１） ［基材粒子の作製］けん化度８７．９％ＰＶＡ（日本合
成化学工業社製ＧＨ−２０）の３％水溶液８００重量部
に、ＤＶＢ１００重量部、ＢＰＯ２重量部の混合液を加
えてホモジナイザーにて攪拌して、粒度調整を行い、そ
の後、窒素気流下にて９０℃で１５時間反応を行った。
洗浄、分級操作後、平均粒子径：４μｍ、ＣＶ値：３％
の基材粒子を得た。(Example 1) [Preparation of base particles] In 800 parts by weight of a 3% aqueous solution of a saponification degree 87.9% PVA (GH-20 manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), 100 parts by weight of DVB and 2 parts by weight of BPO were added. The mixture was added, and the mixture was stirred with a homogenizer to adjust the particle size. Thereafter, the mixture was reacted at 90 ° C. for 15 hours under a nitrogen stream.
After washing and classification operations, average particle diameter: 4 μm, CV value: 3%
Was obtained.
【００２１】［液晶表示装置用スペーサの作製］セパラ
ブルフラスコに、上記基材粒子５０重量部、ＤＭＦ（ジ
メチルホルムアミド）１５０重量部、ＭＭＡ（メチルメ
タクリレート）２５重量部、ＩＢＭ（イソブチルメタク
リレート）５０重量部を投入し、ソニケータにより充分
に分散させた後、均一に攪拌を行った。系に窒素ガスを
導入して、系の温度を５０℃にした後、１Ｎの硝酸水溶
液１００ｇに２．１５ｇの硝酸セリウムアンモニウムを
溶解させた液を添加し、５時間反応させた。反応終了
後、洗浄、乾燥作業を行い評価用スペーサとした。[Preparation of Spacer for Liquid Crystal Display Device] In a separable flask, 50 parts by weight of the base particles, 150 parts by weight of DMF (dimethylformamide), 25 parts by weight of MMA (methyl methacrylate), and 50 parts by weight of IBM (isobutyl methacrylate) The mixture was charged and dispersed sufficiently by a sonicator, and then uniformly stirred. After introducing nitrogen gas into the system and setting the temperature of the system to 50 ° C., a solution prepared by dissolving 2.15 g of cerium ammonium nitrate in 100 g of a 1N aqueous nitric acid solution was added and reacted for 5 hours. After the completion of the reaction, washing and drying were performed to obtain a spacer for evaluation.
【００２２】［液晶表示装置用スペーサの評価］得られ
た評価用スペーサを用いて、ＶＡモードの液晶パネルを
作製した。なお、配向膜は、ポリビニルアルコールの３
％水溶液に、オクタデシルトリメチルアンモニウムクロ
リドを１％添加したものを使用し、ラビング方向は上下
基板間で反対方向とし、偏向板の偏向透過軸はラビング
方向に対して４５°で直交ニコルとした。また、液晶は
メルク社製ＭＬＣ−６６０９を用いた。得られたパネル
はスペーサ周囲の光抜けがほとんど認められず、コント
ラストは８０であった。[Evaluation of Spacer for Liquid Crystal Display Device] Using the obtained spacer for evaluation, a VA mode liquid crystal panel was manufactured. The alignment film is made of polyvinyl alcohol 3
The rubbing direction was the opposite direction between the upper and lower substrates, and the deflecting transmission axis of the deflecting plate was at 45 ° to the rubbing direction and was perpendicular to Nicol. The liquid crystal used was MLC-6609 manufactured by Merck. In the obtained panel, almost no light leakage around the spacer was observed, and the contrast was 80.
【００２３】（比較例１、２及び３）実施例１におい
て、ＭＭＡのみ（比較例１）、ＩＢＭのみ（比較例
２）、ラウリルメタクリレート（ＬＭＡ：Ｃ１２）５０
重量部とＭＭＡ５０重量部（比較例３）を、それぞれ用
いて評価用スペーサを作製したこと以外は同様に液晶パ
ネルを作製した。いずれも、コントラストは３０以下で
あった。(Comparative Examples 1, 2 and 3) In Example 1, only MMA (Comparative Example 1), IBM only (Comparative Example 2), lauryl methacrylate (LMA: C12) 50
A liquid crystal panel was manufactured in the same manner except that an evaluation spacer was manufactured using 50 parts by weight of MMA and 50 parts by weight of MMA (Comparative Example 3). In each case, the contrast was 30 or less.
【００２４】[0024]
【発明の効果】本発明は、上述の構成よりなるので、Ｖ
Ａモードの液晶表示装置においてスペーサ周辺の光り抜
けを防止でき、パネルのコントラストを上げることが可
能になった。Since the present invention has the above-described structure, the V
In the A-mode liquid crystal display device, light leakage around the spacer can be prevented, and the contrast of the panel can be increased.
Claims (2)
液晶表示装置用スペーサであって、その表面に炭素数が
１０以下のアルキル基のみを２種類以上有することを特
徴とする液晶表示装置用スペーサ。1. A spacer for a liquid crystal display device used in a VA mode liquid crystal display device, wherein the spacer has at least two types of alkyl groups having 10 or less carbon atoms on its surface. .
を用いてなることを特徴とする液晶表示装置。2. A liquid crystal display device comprising the spacer for a liquid crystal display device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001164627A JP3779179B2 (en) | 2001-05-31 | 2001-05-31 | Spacer for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001164627A JP3779179B2 (en) | 2001-05-31 | 2001-05-31 | Spacer for liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002357832A true JP2002357832A (en) | 2002-12-13 |
| JP3779179B2 JP3779179B2 (en) | 2006-05-24 |
Family
ID=19007422
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001164627A Expired - Lifetime JP3779179B2 (en) | 2001-05-31 | 2001-05-31 | Spacer for liquid crystal display |
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| Country | Link |
|---|---|
| JP (1) | JP3779179B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7391489B2 (en) | 2004-03-09 | 2008-06-24 | Sharp Kabushiki Kaishia | Liquid crystal display device |
-
2001
- 2001-05-31 JP JP2001164627A patent/JP3779179B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7391489B2 (en) | 2004-03-09 | 2008-06-24 | Sharp Kabushiki Kaishia | Liquid crystal display device |
| US7999891B2 (en) | 2004-03-09 | 2011-08-16 | Sharp Kabushiki Kaisha | Liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3779179B2 (en) | 2006-05-24 |
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