JPH03107921A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH03107921A JPH03107921A JP24742889A JP24742889A JPH03107921A JP H03107921 A JPH03107921 A JP H03107921A JP 24742889 A JP24742889 A JP 24742889A JP 24742889 A JP24742889 A JP 24742889A JP H03107921 A JPH03107921 A JP H03107921A
- Authority
- JP
- Japan
- Prior art keywords
- transparent
- electrode
- liquid crystal
- mineral insulated
- insulating film
- 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.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- 238000010292 electrical insulation Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 6
- 239000011707 mineral Substances 0.000 abstract 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- 125000006850 spacer group Chemical group 0.000 description 4
- 239000000565 sealant Substances 0.000 description 3
- 239000007779 soft material Substances 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- -1 TIO2 Chemical compound 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は液晶表示装置に関し、特に透明基板上に透明電
極を備えた液晶表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a liquid crystal display device, and particularly to a liquid crystal display device having transparent electrodes on a transparent substrate.
［従来の技術］
第２図に従来技術による液晶表示装置の例を示す、一対
のガラスもしくはプラスチックより成る透明基板２１の
表面上に透明量［！２４が形成されている。少な（とも
一方の透明電極２４の上に無機材料の絶縁［２２が形成
され対向電極間の短絡を防止している。各基板上に更に
液晶配向膜２３が形成され、ラビングなどの配向処理を
施されている。液晶配向膜２３はラビング等により配向
構造を構成できるように、比較的軟らかい材料で形成さ
れる。すると、導電性異物が混入した時等に、液晶配向
膜は突き破られることがある。そのままでは導電性異物
が天井板上の電極を短絡することがあるので、硬い５ｉ
０２等の無機絶縁膜２２が少なくとも１層設けられてい
る。この様な液晶配向膜２３を有する透明基板２１をス
ペーサ２６を介して対向させ封止剤２５によって封止す
る。この様にして形成した液晶セル内に液晶を封入し液
晶表示装置を作製する。[Prior Art] FIG. 2 shows an example of a liquid crystal display device according to the prior art.A transparent amount [!] is formed on the surface of a pair of transparent substrates 21 made of glass or plastic. 24 is formed. An insulating layer 22 made of an inorganic material is formed on one of the transparent electrodes 24 to prevent a short circuit between the opposing electrodes.A liquid crystal alignment film 23 is further formed on each substrate and subjected to an alignment process such as rubbing. The liquid crystal alignment film 23 is formed of a relatively soft material so that an alignment structure can be formed by rubbing or the like.The liquid crystal alignment film 23 is made of a relatively soft material so that it can be formed by rubbing or the like.The liquid crystal alignment film 23 is made of a relatively soft material so that it can be pierced by conductive foreign matter. If left as is, conductive foreign matter may short-circuit the electrodes on the ceiling board.
At least one layer of an inorganic insulating film 22 such as 02 is provided. The transparent substrates 21 having such a liquid crystal alignment film 23 are placed facing each other with a spacer 26 in between and sealed with a sealant 25. A liquid crystal display device is manufactured by sealing liquid crystal into the liquid crystal cell thus formed.
透明電極２４は通常インジウム・錫・酸化物（ＩＴＯ）
等で構成される。また無機絶縁膜２２は通常ＳｉＯ□等
で構成される。液晶配向膜２３は通常ポリイミド等で構
成される。また、スペーサ２６は５Ｉ０２の球状体等で
形成される。The transparent electrode 24 is usually indium tin oxide (ITO)
Consists of etc. Further, the inorganic insulating film 22 is usually made of SiO□ or the like. The liquid crystal alignment film 23 is usually made of polyimide or the like. Further, the spacer 26 is formed of a 5I02 spherical body or the like.
［課題を解決するための手段］
本発明によれば、透明電極の電気的絶縁を保障する無機
絶縁膜としてＺｒＯ２、ＴＩＯ２、ＳｉＯ２のうち２種
以上を用いた混合無機絶縁膜を用いる。[Means for Solving the Problems] According to the present invention, a mixed inorganic insulating film using two or more of ZrO2, TIO2, and SiO2 is used as an inorganic insulating film that ensures electrical insulation of a transparent electrode.
［発明が解決しようする課題〕
以上説明した従来の技術によれば、対向電極間の短絡防
止のなめには無機絶縁膜が必要であるが、ＴＩＯの透明
Ｓ極２４が１．８〜２．０程度の屈折率を有するのと比
較して、ＳｉＯ□の無機絶縁膜２２は１．５程度の屈折
率を有する。すなわち、透明電極２４に対して無機絶縁
膜２２の屈折率が低すぎて、透明電極と無機絶縁膜の境
界が屈折率界面を形成し、透明電極２４の形状が見えて
しまう。[Problems to be Solved by the Invention] According to the conventional technology described above, an inorganic insulating film is required to prevent short circuit between opposing electrodes, but the transparent S pole 24 of TIO is 1.8 to 2. Compared to the inorganic insulating film 22 of SiO□, which has a refractive index of about 1.5. That is, the refractive index of the inorganic insulating film 22 is too low relative to the transparent electrode 24, and the boundary between the transparent electrode and the inorganic insulating film forms a refractive index interface, making the shape of the transparent electrode 24 visible.
本発明の目的は、一対の基板上の対向電極間の絶縁を保
障すると共に透明電極の電極足えを改善することができ
る液晶表示装置を提供することである。An object of the present invention is to provide a liquid crystal display device that can ensure insulation between opposing electrodes on a pair of substrates and improve the electrode sufficiency of transparent electrodes.
［作用］
透明電極は、ＩＴＯ，５ｎ０２等で形成され、その屈折
率は１．８〜２．０程度である。[Function] The transparent electrode is made of ITO, 5n02, etc., and has a refractive index of about 1.8 to 2.0.
ＺｒＯ、ＴｉＯ、Ｓ＋０２を混合すると、１．５２ 〜２゜０の範囲の屈折率を作り出すことができる。When ZrO, TiO, S+02 are mixed, 1.52 Refractive indices in the range ˜2°0 can be produced.
たとえば、５１０２のみを用いると、屈折率が低くなり
過ぎる場合、ＺｒＯ、ＴｉＯ□を適当最混合することに
よって、屈折率を所望量増加させることができる。For example, if the refractive index becomes too low when only 5102 is used, the refractive index can be increased by a desired amount by appropriately mixing ZrO and TiO□.
ＺｒＯ、ＴｉＯ、Ｓｉｎ□の内の２種以上を混合２
して混合無機絶縁膜を形成し、単独材料の場合の屈折率
よりも透明電極の屈折率に近付ける屈折率整合を行うこ
とにより、透明電極の電極足えを改善することができる
。By mixing two or more of ZrO, TiO, and Sin□ to form a mixed inorganic insulating film, and performing refractive index matching that brings the refractive index closer to that of the transparent electrode than the refractive index of a single material, transparent The electrode footing of the electrode can be improved.
またこれらの材料は硬い絶縁材料であるので、導電性異
物の混入等に対しても電極間の短絡を防止することがで
きる。Furthermore, since these materials are hard insulating materials, short circuits between the electrodes can be prevented even when conductive foreign matter is mixed in.
［実施例］
第１図は本発明の実施例による液晶表示装置を示す６図
において、１はガラス、プラスチックなどの材料からな
る透明基板、２はＺｒＯ、ＴＩＯ２゜５ｉ０２のうち２
種以上を混合して形成した混合無機絶縁膜、３はポリイ
ミド等の層にラビング等の配向処理を行った液晶配向膜
、４はインジウム・錫・酸化物（ＩＴＯ）等で形成され
た透明Ｔ４極、５は封止剤、６は球状Ｓｉｎ、、等のス
ペーサである。[Embodiment] FIG. 1 is a diagram showing a liquid crystal display device according to an embodiment of the present invention, in which 1 is a transparent substrate made of a material such as glass or plastic, 2 is ZrO, and 2 of TIO2゜5i02
A mixed inorganic insulating film formed by mixing more than one species; 3 is a liquid crystal alignment film formed by applying an alignment treatment such as rubbing to a layer of polyimide, etc.; 4 is a transparent T4 formed of indium-tin-oxide (ITO), etc. 5 is a sealant, and 6 is a spacer such as a spherical Sin.
図の構造においては、一対の透明基板１の上に透明型［
ｉ４が形成され、その透明電極４を覆って両透明基板１
のほぼ全面上に混合無機絶縁膜２が形成されている。こ
の混合無機絶縁膜２全面を覆って液晶配向ＷＡ３が形成
されている。透明電極４と混合無機絶縁膜２の屈折率を
整合させると、透明を極４と混合無機絶縁膜２は光学的
にほぼ等質となり、透明″ｔｈｆ！４の輪郭は光学的に
混合無機絶縁ＷＡ２と区別でき難くなるので電極足えが
改善される。屈折率が同一の場合は、輪郭が全く見えな
いようにすることができる。混合無機絶縁膜２と液晶配
向ＷＡ３とは屈折率が異なっても、その界面は平面状に
拡がっているので、視覚上輪郭が見えることはなく、支
障はない。In the structure shown in the figure, a transparent mold [
i4 is formed, and both transparent substrates 1 cover the transparent electrode 4.
A mixed inorganic insulating film 2 is formed on almost the entire surface. A liquid crystal alignment WA3 is formed covering the entire surface of this mixed inorganic insulating film 2. When the refractive indexes of the transparent electrode 4 and the mixed inorganic insulating film 2 are matched, the transparent electrode 4 and the mixed inorganic insulating film 2 become optically almost equal, and the outline of the transparent "thf!4" is optically similar to that of the mixed inorganic insulating film 2. Since it becomes difficult to distinguish from WA2, the electrode support is improved.If the refractive index is the same, the outline can be made completely invisible.The mixed inorganic insulating film 2 and the liquid crystal alignment WA3 have different refractive indexes. However, since the interface is spread out in a flat plane, the outline is not visually visible and there is no problem.
図示の場合のように、両透明基板上で透明電極を覆って
、混合無機絶縁膜を形成すると、両基板上で電極足えの
問題を改善できるとともに、良好な電気的絶縁性を確保
できる。If a mixed inorganic insulating film is formed covering the transparent electrodes on both transparent substrates as in the illustrated case, the problem of insufficient electrodes on both substrates can be alleviated, and good electrical insulation can be ensured.
両基板上で同等の構造を採用すると、屈折率整合の間Ｕ
も両基板上で同等となるが、必ずしも両基板上に無機絶
縁膜を設ける必要はない、一方の基板上には透明電極を
覆って液晶配向層を形成し、他方の基板上には透明電極
を覆って無機絶縁膜を形成する場合は、上記他方の基板
上のｆｉｌｌ！絶縁膜を上述同様の混合無機絶縁膜とす
ることによって、他方の基板上のｔ極見えが改善できる
。一方の基板上では、液晶配向層と透明電極との屈折率
の差が大きくなければ、電極足えの問題は比較的に大き
くない。Adopting equivalent structures on both substrates, U
is the same on both substrates, but it is not necessarily necessary to provide an inorganic insulating film on both substrates.On one substrate, a liquid crystal alignment layer is formed covering the transparent electrode, and on the other substrate, a transparent electrode is formed. When forming an inorganic insulating film covering the fill! By using a mixed inorganic insulating film as described above as the insulating film, the visibility of the t-pole on the other substrate can be improved. On one substrate, if the difference in refractive index between the liquid crystal alignment layer and the transparent electrode is not large, the problem of electrode shortage is relatively small.
このように、ＺｒＯ２，ＴｉＯ、５ｉＯｚのうち２種以
上の材料を混合することにより、これら３種の材料の屈
折率の中間値を自由に選択することができる。従って、
透明電極の組成及び屈折率に合わせて混合無機絶縁膜の
混合比を選択すれば屈折率の整合を行うことができる。In this way, by mixing two or more materials among ZrO2, TiO, and 5iOz, the intermediate value of the refractive index of these three materials can be freely selected. Therefore,
The refractive index can be matched by selecting the mixing ratio of the mixed inorganic insulating film according to the composition and refractive index of the transparent electrode.
以上実施例に沿って本発明を説明したが、本発明はこれ
らに限定されるものではない、たとえば、種々の改良、
変更、組み合わせ等が可能なことは等業者に自明であろ
う。Although the present invention has been described above in accordance with the examples, the present invention is not limited to these examples. For example, various improvements,
It will be obvious to those skilled in the art that changes, combinations, etc. are possible.
［発明の効果〕
以上説明したように、本発明によれば混合無機絶縁膜を
用いることにより、電極間短絡を防止すると共に、透明
電極と無機絶縁膜との間で屈折率整合を行うことができ
る。[Effects of the Invention] As explained above, according to the present invention, by using a mixed inorganic insulating film, short circuits between electrodes can be prevented, and refractive index matching can be performed between the transparent electrode and the inorganic insulating film. can.
この為、電極見えを改善することができる０片側の電極
のみが浮き上がって見えるような電極見えも防止するこ
とができる。Therefore, it is possible to improve the appearance of the electrodes.0 It is also possible to prevent the appearance of electrodes in which only one side of the electrode appears to be raised.
第１図は本発明の実施例による液晶表示装置の断面図、 第２図は従来技術による液晶表示装置の断面図である。 透明基板 混合無機絶縁膜 液晶配向膜 透明′ｒｒｋ極 封止剤 スペーサ FIG. 1 is a cross-sectional view of a liquid crystal display device according to an embodiment of the present invention; FIG. 2 is a sectional view of a liquid crystal display device according to the prior art. transparent substrate Mixed inorganic insulation film liquid crystal alignment film Transparent 'rrk pole Sealant Spacer
Claims (1)
膜であり、ＺｒＯ＿２、ＴｉＯ＿２、ＳｉＯ＿２のうち
２種以上を混合した材料より形成され、透明電極との間
で屈折率整合した混合無機絶縁膜 を備えることを特徴をする液晶表示装置。(1) A transparent substrate, a transparent electrode formed on the transparent substrate, and a mixed inorganic insulating film formed on the transparent substrate covering the transparent electrode, which is a mixture of two or more of ZrO_2, TiO_2, and SiO_2. 1. A liquid crystal display device comprising a mixed inorganic insulating film made of a material having a refractive index matched with a transparent electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24742889A JPH03107921A (en) | 1989-09-22 | 1989-09-22 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24742889A JPH03107921A (en) | 1989-09-22 | 1989-09-22 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03107921A true JPH03107921A (en) | 1991-05-08 |
Family
ID=17163294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24742889A Pending JPH03107921A (en) | 1989-09-22 | 1989-09-22 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03107921A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220446A (en) * | 1990-11-29 | 1993-06-15 | Goldstar Co., Ltd. | Liquid crystal display elements with spacers attached to insulation and orientation layers and method for manufacturing them |
| JP2007304529A (en) * | 2006-05-10 | 2007-11-22 | Trendon Touch Technology Corp | Method of hiding transparent electrode on transparent substrate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5662224A (en) * | 1979-10-25 | 1981-05-28 | Seiko Epson Corp | Construction of display panel |
-
1989
- 1989-09-22 JP JP24742889A patent/JPH03107921A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5662224A (en) * | 1979-10-25 | 1981-05-28 | Seiko Epson Corp | Construction of display panel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220446A (en) * | 1990-11-29 | 1993-06-15 | Goldstar Co., Ltd. | Liquid crystal display elements with spacers attached to insulation and orientation layers and method for manufacturing them |
| JP2007304529A (en) * | 2006-05-10 | 2007-11-22 | Trendon Touch Technology Corp | Method of hiding transparent electrode on transparent substrate |
| JP2014132469A (en) * | 2006-05-10 | 2014-07-17 | Trendon Touch Technology Corp | Treatment method of preventing transparent electrode in transparent substrate from being viewed |
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