JP2005099467A - Electrooptical device - Google Patents

Electrooptical device Download PDF

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JP2005099467A
JP2005099467A JP2003333546A JP2003333546A JP2005099467A JP 2005099467 A JP2005099467 A JP 2005099467A JP 2003333546 A JP2003333546 A JP 2003333546A JP 2003333546 A JP2003333546 A JP 2003333546A JP 2005099467 A JP2005099467 A JP 2005099467A
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Shoichi Uchiyama
正一 内山
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Seiko Epson Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a new electrooptical device capable of securely reducing surface reflection and effectively preventing sticking of stains, wear of a surface, etc., due to physical contact. <P>SOLUTION: The electrooptical device equipped with a display panel 10 whose outermost surface is in moth-eye structure is equipped with a projection body 42 which is taller than the most projecting part of the moth-eye structure on the outermost surface of the display panel 10. Consequently, fingers and the hands of a user never come into direct contact with the moth-eye structure, so the moth-eye structure is prevented from being stained and wearing away owing to physical contact, and an antireflection characteristic of the moth-eye structure can be exhibited for a long period. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、ＬＣＤ（液晶ディスプレイ）の他、ＯＬＥＤ（有機エレクトロルミネッセンスディスプレイ）、ＥＰＤ（電気泳動ディスプレイ）、ＰＤＰ（プラズマディスプレイ）等の電気光学装置に係り、特にユーザが直接目視したり、接触したりすその表示面の構造に関するものである。   The present invention relates to an electro-optical device such as an OLED (organic electroluminescence display), an EPD (electrophoretic display), and a PDP (plasma display) in addition to an LCD (liquid crystal display). This relates to the structure of the display surface.

係る電気光学装置の表示面（以下、適宜表示パネルという）への蛍光灯や外光等の写り込みよる視認性の悪化を回避する方法としては、その表示パネル表面に誘電体多層膜からなる反射防止膜や反射防止フィルタを形成する方法の他、その表示面を例えば、以下の特許文献１等に示すようにモスアイ（moth-eye：蛾の目）構造とする方法が提案されている。   As a method of avoiding deterioration in visibility due to the reflection of fluorescent lamps or external light on the display surface (hereinafter referred to as a display panel as appropriate) of such an electro-optical device, a reflection made of a dielectric multilayer film on the display panel surface. In addition to a method for forming an anti-reflection film and an anti-reflection filter, a method has been proposed in which the display surface has a moth-eye structure as shown in, for example, Patent Document 1 below.

このモスアイ構造とは、その表示面の最表面が、高さ数十〜数百ｎｍ程度の円錐状の突起が敷き詰められたような微細な凹凸形状となったものであり、反射防止膜や反射防止フィルタを形成する方法に比べて光線の入射角依存性が小さく、広い波長帯域に亘って良好な反射防止効果を発揮することが可能となっている。
しかしながら、このようなモスアイ構造の場合では、その表面に手や物が触れるとその凹部に手垢等の汚れが入り込んだり、その凸部が摩耗したりしてその反射防止効果を長期に亘って発揮することが難しいといった欠点がある。 This moth-eye structure has a fine irregular shape in which the outermost surface of the display surface is covered with conical protrusions with a height of about several tens to several hundreds of nanometers. Compared with the method of forming the prevention filter, the incident angle dependency of the light beam is small, and a good antireflection effect can be exhibited over a wide wavelength band.
However, in the case of such a moth-eye structure, when a hand or an object touches the surface, dirt such as dirt enters the concave portion, or the convex portion is worn, and the antireflection effect is exhibited over a long period of time. There is a drawback that it is difficult to do.

そのため、従来では、例えば以下の特許文献２等に示すように、このモスアイ構造部をＴｉＯ２やＺｎＯといった光触媒物質で形成し、その光触媒物質の酸化還元機能によって表面に付着した汚れを酸化・還元して除去するようにしたり、あるいは以下の特許文献３等に示すように、モスアイ構造をした窓材を、そのモスアイ構造が形成された面が内面に向くように配置したりすることでそのモスアイ構造部分への汚れの付着や表面摩耗を防止するような方法も提案されている。
特開２００３−１３１３９０号公報 特開２００１−１８３５０６号公報 特開２００３−４９１６号公報 Therefore, conventionally, as shown in, for example, Patent Document 2 below, this moth-eye structure is formed of a photocatalytic material such as TiO 2 or ZnO, and the dirt attached to the surface is oxidized / reduced by the redox function of the photocatalytic material. The window material having the moth-eye structure is arranged so that the surface on which the moth-eye structure is formed faces the inner surface, as shown in Patent Document 3 below. Methods have also been proposed that prevent the adhesion of dirt and surface wear to structural parts.
JP 2003-131390 A JP 2001-183506 A JP 2003-4916 A

しかしながら、前者の方法、すなわち光触媒物質でモスアイ構造を形成する方法では、その光触媒物質の分解作用には寿命があるため、長期に渡ってその機能を発揮することができない。しかも、その光触媒作用により、基材の分解作用が生じ、特に高分子偏光板が最表面に配置されるＬＣＤへの応用が難しいといった問題点がある。加えて物理的な接触による表面摩耗を回避することも難しい。   However, in the former method, that is, a method of forming a moth-eye structure with a photocatalytic substance, the decomposition action of the photocatalytic substance has a lifetime, and thus the function cannot be exhibited over a long period of time. In addition, the photocatalytic action causes a decomposition action of the substrate, and there is a problem that application to an LCD in which a polymer polarizing plate is arranged on the outermost surface is difficult. In addition, it is difficult to avoid surface wear due to physical contact.

一方、後者の方法、すなわち、モスアイ構造を窓材の裏面側に設ける方法では、物理的な接触による汚れの付着や摩耗を防止することは可能であるが、その最表面は平滑面となっているため、その最表面の反射を低減することはできない。
そこで、本発明はこのような課題を有効に解決するために案出されたものであり、その主な目的は、表面反射を確実に低減し、かつ、物理的な接触による汚れの付着や表面の摩耗等を効果的に防止することができる新規な電気光学装置を提供するものである。 On the other hand, the latter method, that is, the method of providing the moth-eye structure on the back side of the window material can prevent the adhesion and abrasion of dirt due to physical contact, but the outermost surface is a smooth surface. Therefore, the reflection on the outermost surface cannot be reduced.
Therefore, the present invention has been devised in order to effectively solve such problems, and its main purpose is to reliably reduce surface reflection, and to prevent the adhesion of dirt and the surface due to physical contact. The present invention provides a novel electro-optical device that can effectively prevent wear and the like.

〔発明１〕 上記課題を解決するために本発明１の電気光学装置は、
最表面がモスアイ構造の表示パネルを備えたディスプレイ装置において、前記表示パネルの最表面に前記モスアイ構造の最凸部よりも高い突出体を備えたことを特徴とするものである。
このように表示パネルの最表面に前記モスアイ構造の最凸部よりも高い突出体を備えることによってユーザの指や手が直接モスアイ構造部分に触れるようなことがなくなるため、物理的な接触によるモスアイ構造部分の汚れや摩耗を防止することができ、また、モスアイ構造の反射防止特性を長期に亘って発揮させることができる。 [Invention 1] In order to solve the above-described problems, an electro-optical device according to Invention 1 includes:
In the display device having the display panel having the moth-eye structure on the outermost surface, a protrusion higher than the most convex portion of the moth-eye structure is provided on the outermost surface of the display panel.
By providing a protrusion higher than the most convex part of the moth-eye structure on the outermost surface of the display panel in this way, the user's finger or hand does not directly touch the moth-eye structure part. The structure portion can be prevented from being stained and worn, and the anti-reflection characteristic of the moth-eye structure can be exhibited over a long period of time.

〔発明２〕 発明２の電気光学装置は、
発明１に記載の電気光学装置において、前記突出体は、前記表示パネルの光を透過しない非開口部に略対応する部位に設けられていることを特徴とするものである。
このように前記突出体を前記表示パネルの非開口部に略対応する部位に備えれば、前記表示パネルの光の透過を悪化させることがなくなり、表示品質の低下も防止することができる。 [Invention 2] The electro-optical device according to Invention 2 comprises:
In the electro-optical device according to the first aspect of the invention, the protrusion is provided at a portion that substantially corresponds to a non-opening that does not transmit light of the display panel.
Thus, if the protrusion is provided in a portion substantially corresponding to the non-opening portion of the display panel, the light transmission of the display panel is not deteriorated, and the display quality can be prevented from being deteriorated.

〔発明３〕 発明３の電気光学装置は、
発明１又は２に記載の電気光学装置において、前記突出体は、前記表示パネルの光を透過する開口部を囲むように土手状に形成されていることを特徴とするものである。
これによって、特に表示パネルの光の開口部に対する物理的な接触による汚れや摩耗をより確実に防止して反射防止特性を長期に渡って発揮させることができる。 [Invention 3] The electro-optical device according to Invention 3 comprises:
The electro-optical device according to the first or second aspect is characterized in that the projecting body is formed in a bank shape so as to surround an opening that transmits light of the display panel.
This makes it possible to more reliably prevent contamination and wear due to physical contact with the light opening of the display panel, and to exhibit the antireflection characteristic for a long time.

〔発明４〕 発明４の電気光学装置は、
発明１〜３のいずれかに記載の電気光学装置において、前記突出体の頂部が平面になっていると共に、その平面部は、その光学特性が表示の目的に応じて最適化されていることを特徴とするものである。
これによって、前記発明１〜３の効果に加えてその光学特性を以下に示すように表示の目的に応じて最適化することが可能となる。 [Invention 4] The electro-optical device according to Invention 4 comprises:
In the electro-optical device according to any one of the first to third aspects, the top of the projecting body is a flat surface, and the optical characteristics of the flat surface portion are optimized according to the purpose of display. It is a feature.
As a result, in addition to the effects of the first to third aspects, the optical characteristics can be optimized according to the purpose of display as shown below.

〔発明５〕 発明５の電気光学装置は、
発明１〜３のいずれかに記載の電気光学装置において、前記突出体の表面は、白色の光拡散特性を有していると共に、前記電気光学装置に白色表示した際の表示面の白色度が５５％以上であることを特徴とするものである。
これによって、前記発明１〜３の効果に加えて、その表示パネル表面の一定割合の面積が通常の印刷用紙と同等の光学特性を発揮することができるため、その表示パネル表面が紙印刷物に近い表面質感を発揮することができる。 [Invention 5] The electro-optical device according to Invention 5 comprises:
In the electro-optical device according to any one of the first to third aspects, the surface of the protrusion has a white light diffusion characteristic, and the whiteness of the display surface when white display is performed on the electro-optical device. It is characterized by being 55% or more.
Thereby, in addition to the effects of the first to third aspects, the display panel surface is close to a printed paper because the surface area of the display panel can exhibit optical characteristics equivalent to those of normal printing paper. The surface texture can be demonstrated.

〔発明６〕 発明６の電気光学装置は、
発明１〜３のいずれかに記載の電気光学装置において、前記突出体の表面は、白色の光拡散特性を有していると共に、前記電気光学装置に白色表示した際の表示面の白色度が７５％以上であることを特徴とするものである。
これによって、前記発明１〜３の効果に加えて、その表示パネル表面の一定割合の面積が上質紙と同等の光学特性を発揮することができるため、その表示パネル表面が高級な紙印刷物に近い表面質感を発揮することができる。 [Invention 6] The electro-optical device according to Invention 6 comprises:
In the electro-optical device according to any one of the first to third aspects, the surface of the protrusion has a white light diffusion characteristic, and the whiteness of the display surface when white display is performed on the electro-optical device. It is characterized by being 75% or more.
Thus, in addition to the effects of the first to third aspects, the display panel surface is close to a high-quality paper print because the area of the display panel surface can exhibit optical characteristics equivalent to that of fine paper. The surface texture can be demonstrated.

以下、本発明を実施するための最良の形態を添付図面を参照しながら詳述する。
図１は、本発明に係る電気光学装置のうち液晶表示パネル（ＬＣＤ）１０の実施の一形態を示す拡大断面図である。
図において、２０は液晶層であり、その液晶層２０の下部には下側ガラス基板２２を介して下側偏光板２４が、また、その液晶層２０の上部には上側ガラス基板２６を介して上側偏光板２８が備えられている。 Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an enlarged cross-sectional view showing an embodiment of a liquid crystal display panel (LCD) 10 in the electro-optical device according to the invention.
In the figure, reference numeral 20 denotes a liquid crystal layer, a lower polarizing plate 24 is provided below the liquid crystal layer 20 via a lower glass substrate 22, and an upper glass substrate 26 is provided above the liquid crystal layer 20. An upper polarizing plate 28 is provided.

また、その液晶層２０両側のガラス基板２２，２６間には図示しない配向膜を挟んで画素電極３０と対向電極３２とがそれぞれ設けられていると共に、その画素電極３０側にはＴＦＴ素子３４が複数、一定の間隔を隔てて設けられている。
さらに、これら各ＴＦＴ素子３４と対向する対向電極３２側には、図２に示すような形状をした格子状のブラックストライプ３６が設けられており、このブラックストライプ３６によって上側ガラス基板２６に矩形状の開口部Ｗが非開口部Ｒを挟んで格子状に多数形成されるようになっている。 A pixel electrode 30 and a counter electrode 32 are provided between the glass substrates 22 and 26 on both sides of the liquid crystal layer 20 with an alignment film (not shown) interposed therebetween, and a TFT element 34 is provided on the pixel electrode 30 side. A plurality of them are provided at regular intervals.
Further, a grid-like black stripe 36 having a shape as shown in FIG. 2 is provided on the side of the counter electrode 32 facing each of the TFT elements 34, and the black stripe 36 forms a rectangular shape on the upper glass substrate 26. A large number of openings W are formed in a lattice shape with the non-opening R interposed therebetween.

すなわち、ここでいう開口部Ｗとは、下側偏光板２４の下面に配置された図示しないバックライトからの出射光が透過する部分を、また、非開口部Ｒとはその出射光が透過しない部分をいう総称であり、具体的には、各ＴＦＴ素子３４を保護するようにその上部に形成されたブラックストライプ３６の部分が非開口部Ｒとなり、その他の部分が開口部Ｗということになる。尚、このブラックストライプ３６は、ポリシリコン、クロム、アルミニウム、黒色顔料といった光吸収性若しくは光反射性の材料で形成されており、ＬＣＤを観察者側から見たときには図２に示す如く、マトリックス状の暗部として視認される。   That is, the opening W here refers to a portion where light emitted from a backlight (not shown) disposed on the lower surface of the lower polarizing plate 24 is transmitted, and the non-opening portion R does not transmit light emitted therefrom. Specifically, the portion of the black stripe 36 formed on the upper portion so as to protect each TFT element 34 is a non-opening portion R, and the other portion is an opening portion W. . The black stripe 36 is formed of a light-absorbing or light-reflecting material such as polysilicon, chrome, aluminum, or black pigment. When the LCD is viewed from the viewer side, as shown in FIG. It is visually recognized as a dark part.

また、前記上側偏光板２８上であって各開口部Ｗに相当する部分には、その表面が微細な凹凸構造（モスアイ構造）をした透明な薄膜層４０が形成されている。
この透明薄膜層４０は、その表面に微細な凹凸を、水平面内の周期を可視光波長（３８０〜７８０ｎｍ）よりも短い間隔の周期性（さらに好ましくは緑色の光波長に相当する５５０ｎｍの１／２程度の周期性）をもって二次元的に配列したものであり、このようにその表面を微細な凹凸形状とすることにより、その透明薄膜層４０の実効的な屈折率が連続的に変化するようになっている。 A transparent thin film layer 40 having a fine concavo-convex structure (moth eye structure) is formed on the upper polarizing plate 28 corresponding to each opening W.
The transparent thin film layer 40 has fine irregularities on its surface, a period in the horizontal plane having a periodicity with an interval shorter than the visible light wavelength (380 to 780 nm) (more preferably 1/550 nm corresponding to the green light wavelength). It is arranged in a two-dimensional manner with a periodicity of about 2), and the effective refractive index of the transparent thin film layer 40 is continuously changed by making the surface in such a fine uneven shape in this way. It has become.

この結果、この表示パネル１０表面の空気と上側偏光板２８との間に屈折率が大きく異なる界面が存在しなくなるため、表示パネル１０表面の光の反射が抑えられて反射による表示の悪化が防止されることになる。尚、この透明薄膜層４０の凹凸の水平面内周期は、必ずしも面内全てに亘り均一である必要はなく、また、凹凸の断面構造は上面幅が下面幅より広い略台形状であることが望ましく、理想的には上面幅が限りなくゼロに近い略三角形状であることが望ましい。   As a result, there is no interface having a significantly different refractive index between the air on the surface of the display panel 10 and the upper polarizing plate 28, so that reflection of light on the surface of the display panel 10 is suppressed and deterioration of display due to reflection is prevented. Will be. It should be noted that the period in the horizontal plane of the irregularities of the transparent thin film layer 40 is not necessarily uniform over the entire plane, and the sectional structure of the irregularities is preferably substantially trapezoidal in which the upper surface width is wider than the lower surface width. Ideally, it is desirable that the top surface has a substantially triangular shape that is as close to zero as possible.

また、このモスアイ構造をした透明薄膜層４０は、例えばディップコート法、スプレイコート法、スピンコート法、グラビアコート法等の公知の成膜方法によって形成された透明薄膜の表面をフォトリソグラフィ等による選択的なエッチング法や、予め微細凹凸形状を有する型を用いたエンボス加工法等を用いて微細な凹凸形状に加工することで容易に得ることができる。さらに、大量生産を前提とした場合の最も実用的な形成方法としては、ＵＶ（紫外線）硬化樹脂を硬化物層として２Ｐ法によって型形状を転写する方法を採用することができる。   The transparent thin film layer 40 having the moth-eye structure is selected by photolithography or the like on the surface of the transparent thin film formed by a known film formation method such as a dip coating method, a spray coating method, a spin coating method, or a gravure coating method. It can be easily obtained by processing into a fine concavo-convex shape using a general etching method or an embossing method using a mold having a fine concavo-convex shape in advance. Furthermore, as a most practical formation method on the premise of mass production, a method of transferring a mold shape by a 2P method using a UV (ultraviolet) curable resin as a cured product layer can be employed.

そして、本発明の表示パネル１０にあっては、その上側偏光板２８上の非開口部Ｒに略対応する部位に、前記透明薄膜層４０の最凸部よりも高い土手状の突出体４２がその開口部Ｗの周囲を囲むように形成されている。
従って、このように表示パネル１０の最表面に前記モスアイ構造の最凸部よりも高い突出体４２を備えることによって仮にユーザの指や手がパネル１０表面に触れてもこれが直接モスアイ構造部分に接触するようなことがなくなるため、モスアイ構造部分の汚れや摩耗を効果的に防止することができ、モスアイ構造の反射防止特性を長期に亘って維持することが可能となる。 In the display panel 10 of the present invention, a bank-like protrusion 42 that is higher than the most convex portion of the transparent thin film layer 40 is provided at a portion substantially corresponding to the non-opening portion R on the upper polarizing plate 28. It is formed so as to surround the periphery of the opening W.
Therefore, by providing the protrusion 42 higher than the most convex part of the moth-eye structure on the outermost surface of the display panel 10 as described above, even if a user's finger or hand touches the surface of the panel 10, this directly contacts the moth-eye structure part. Therefore, the moth-eye structure can be effectively prevented from being stained and worn, and the anti-reflection characteristics of the moth-eye structure can be maintained over a long period of time.

また、このような土手状の突出体４２を前記表示パネル１０の非開口部Ｒに略対応する部位に備えることにより、前記表示パネル１０の光の透過性に悪影響、すなわち光透過量を悪化させることもないため、表示品質の低下を招くこともない。
ここで、この土手状の突出体４２の製造方法としては、あらかじめ上側偏光板２８の上面に透明薄膜層４０を全面に亘って形成し、その上面の所定の位置に印刷技術やインクジェットマイクロ液体プロセスを用いて突出体４２の構成材料もしくはそれを分散させた分散液を塗布することで容易に形成することができる。尚、突出体４２の構成材料としては、例えば、ＵＶ硬化樹脂、熱硬化樹脂といった硬化性樹脂あるいは樹脂固形分、無機固形分とバインダー成分の混合物が挙げられる。 Further, by providing such a bank-like protrusion 42 at a portion substantially corresponding to the non-opening portion R of the display panel 10, the light transmittance of the display panel 10 is adversely affected, that is, the light transmission amount is deteriorated. Therefore, the display quality is not deteriorated.
Here, as a method for manufacturing the bank-like protrusion 42, the transparent thin film layer 40 is formed on the upper surface of the upper polarizing plate 28 in advance over the entire surface, and a printing technique or an ink jet micro liquid process is formed at a predetermined position on the upper surface. Can be easily formed by applying the constituent material of the projecting body 42 or the dispersion liquid in which it is dispersed. In addition, as a constituent material of the protrusion body 42, for example, a curable resin such as a UV curable resin or a thermosetting resin, a resin solid content, a mixture of an inorganic solid content and a binder component can be given.

また、土手状の突出体４２の構成材料そのもの、若しくはその上面のコーティング材料にシリカ、雲母、チタニア等の白色光拡散性物質を含ませると、モスアイ構造の防汚機能を兼ねながら表示画質の向上を図ることができる。
すなわち、上記材料を用いて土手状の突出体４２全体、若しくは少なくともその表面を白色にすることにより、表示パネル１０の最表面に光拡散性が高い白色の表面領域が一定割合で形成され、それによって人間の目にはパネル１０表面が白色の紙と同等もしくはそれに近い素材で形成されているかの如き知覚を生じる。この結果、その表面に開口部Ｗを透過して画像表示光が重畳されると、あたかも紙面上に画像が表示されているかのように知覚されて表示画質の向上を図ることができる。 In addition, when white light diffusive substances such as silica, mica, and titania are included in the constituent material of the bank-like protruding body 42 or the coating material on the upper surface, the display image quality is improved while also having the antifouling function of the moth-eye structure. Can be achieved.
That is, the entire surface of the bank-like protrusion 42 or at least the surface thereof is made white using the above material, whereby a white surface region having a high light diffusibility is formed on the outermost surface of the display panel 10 at a certain rate. Thus, the human eye perceives that the surface of the panel 10 is formed of a material equivalent to or close to that of white paper. As a result, when the image display light is superimposed on the surface through the opening W, it is perceived as if an image is displayed on the paper surface, and the display image quality can be improved.

さらには、前述のモスアイ構造の光反射防止機能によって、不自然な外光の照り返しが低減されるため、紙印刷物を想起させるような見やすい表示を実現することができる。そして、このような効果は、特に白基調の文書等を表示する用途で有用である。
また、上記の効果をさらに高める目的で、図４の如く、土手状の突出体４２を開口部Ｗの一部（角部）を覆うように形成し、開口部Ｗに対して表示面における土手状の突出体４２の面積比を増大させても良い。 Furthermore, since the reflection of unnatural outside light is reduced by the light reflection preventing function of the moth-eye structure described above, it is possible to realize an easy-to-view display reminiscent of a printed paper. Such an effect is particularly useful for displaying a white tone document or the like.
Further, for the purpose of further enhancing the above effect, a bank-like projecting body 42 is formed so as to cover a part (corner part) of the opening W as shown in FIG. The area ratio of the projecting body 42 may be increased.

また、目的に応じて土手状の突出体４２の平面形状を変更しても良い。例えば、図５の如く、開口部形状を円形にすると、マトリクス構造で発生しやすい表示のギザギザ感を大幅に低減することが可能となり、さらには、印刷物の網点画素構造に似た表示品位を得ることも可能となる。
そして、このように紙印刷物と同等もしくはそれに近い質感を得るためには、表示パネルに白色表示をした際の表示パネル１０表面の白色度が５５％以上あることが望ましく、さらに上質紙印刷物のような高級感のある質感を得るためには白色度が７５％以上あることが好ましい。また、その上面の色調は、白色以外に表示の目的に応じて変更することも可能である。 Moreover, you may change the planar shape of the bank-shaped protrusion 42 according to the objective. For example, as shown in FIG. 5, when the opening shape is circular, it is possible to greatly reduce the jagged feeling of the display that is likely to occur in the matrix structure, and furthermore, the display quality similar to the halftone pixel structure of the printed matter can be obtained. It can also be obtained.
In order to obtain a texture equivalent to or close to that of the printed paper as described above, it is desirable that the whiteness of the surface of the display panel 10 when displaying white on the display panel is 55% or more, and further, the printed paper is like a high-quality paper printed material. In order to obtain a high quality texture, the whiteness is preferably 75% or more. The color tone of the upper surface can be changed according to the purpose of display other than white.

また、この土手状の突出体４２は、前記モスアイ構造をした透明薄膜層４０と共に、光触媒作用を有する材料で形成したり、有機ポロシロキサン系樹脂やフッ素系樹脂材料等の撥水性の高い材料で形成したりすれば、さらに防汚効果を向上させることも可能である。また、図６に示すように、ＲＧＢ各サブピクセルが並んだカラー表示用のディスプレイの場合も同様である。   The bank-like protrusions 42 are made of a material having a photocatalytic action together with the transparent thin film layer 40 having the moth-eye structure, or made of a material having high water repellency such as an organic polysiloxane-based resin or a fluorine-based resin material. If formed, the antifouling effect can be further improved. Further, as shown in FIG. 6, the same applies to a display for color display in which RGB sub-pixels are arranged.

また、この突出体４２は必ずしも土手状である必要はなく、三角錐状であったり、ピン状であったりしても良い。そして、このように突出体４２を三角錐状やピン状に形成した場合では、光を遮る面積が小さいため、非開口部Ｒの部分のみならず開口部Ｗの位置に設けても良い。
また、本実施の形態では、電気光学装置としてＬＣＤの例で示したが、本発明はこれに限定されず、他のあらゆるディスプレイ装置、例えば従来から多用されているＣＲＴ（cathode-ray tube）の他、次世代の表示用モニタとして注目されているエレクトロルミネッセンス装置、特に有機エレクトロルミネッセンス装置、無機エレクトロルミネッセンス装置等や、プラズマディスプレイ装置、ＬＥＤ（発光ダイオード）表示装置、電気泳動ディスプレイ装置、薄型のブラウン管、液晶シャッター等を用いた小型テレビ、デジタルマイクロミラーデバイス（ＤＭＤ）を用いた装置、ＦＥＤ（Field Emission Display）やＳＥＤ（Surface-Conduction Electron-Emitter Display）等にも適用することができる。 Further, the projecting body 42 does not necessarily have a bank shape, and may have a triangular pyramid shape or a pin shape. In the case where the protrusions 42 are formed in a triangular pyramid shape or a pin shape in this way, the light blocking area is small, so that the protrusions 42 may be provided not only in the non-opening portion R but also in the opening portion W.
In this embodiment, an example of an LCD is shown as an electro-optical device. However, the present invention is not limited to this, and any other display device such as a CRT (cathode-ray tube) that has been widely used in the past has been used. In addition, electroluminescence devices that are attracting attention as next-generation display monitors, especially organic electroluminescence devices, inorganic electroluminescence devices, plasma display devices, LED (light emitting diode) display devices, electrophoretic display devices, thin cathode ray tubes The present invention can also be applied to small televisions using liquid crystal shutters, devices using digital micromirror devices (DMD), FEDs (Field Emission Displays), SEDs (Surface-Conduction Electron-Emitter Displays), and the like.

本発明に係る液晶表示パネルの実施の一形態を示す拡大断面図である。It is an expanded sectional view which shows one Embodiment of the liquid crystal display panel which concerns on this invention. ブラックストライプを示す拡大平面図である。It is an enlarged plan view showing a black stripe. 図１中Ａ部を示す部分拡大図である。It is the elements on larger scale which show the A section in FIG. 土手状の突出体を設けた表示パネルを示す拡大平面図である。It is an enlarged plan view which shows the display panel which provided the bank-like protrusion. 土手状の突出体を設けた表示パネルを示す拡大平面図である。It is an enlarged plan view which shows the display panel which provided the bank-like protrusion. 突出体を設けたカラーディスプレイを示す拡大平面図である。It is an enlarged plan view which shows the color display which provided the protrusion.

符号の説明Explanation of symbols

１０…液晶表示パネル（ＬＣＤ）、２０…液晶層、２２…下側ガラス基板、２４…下側偏光板、２６…上側ガラス基板、２８…上側偏光板、３０…画素電極、３２…対向電極、３４…ＴＦＴ素子、３６…ブラックストライプ、４０…透明薄膜層、４２…突出体、Ｒ…非開口部、Ｗ…開口部。   DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display panel (LCD), 20 ... Liquid crystal layer, 22 ... Lower glass substrate, 24 ... Lower polarizing plate, 26 ... Upper glass substrate, 28 ... Upper polarizing plate, 30 ... Pixel electrode, 32 ... Counter electrode, 34: TFT element, 36: Black stripe, 40: Transparent thin film layer, 42: Projection, R: Non-opening, W: Opening.

Claims (6)

最表面がモスアイ構造の表示パネルを備えたディスプレイ装置において、前記表示パネルの最表面に前記モスアイ構造の最凸部よりも高い突出体を備えたことを特徴とする電気光学装置。   An electro-optical device, comprising: a display panel having a moth-eye structure on the outermost surface, wherein a protrusion higher than the most convex portion of the moth-eye structure is provided on the outermost surface of the display panel. 請求項１に記載の電気光学装置において、前記突出体は、前記表示パネルの光が透過しない非開口部に略対応する部位に設けられていることを特徴とする電気光学装置。   2. The electro-optical device according to claim 1, wherein the protrusion is provided at a portion substantially corresponding to a non-opening portion through which light of the display panel does not transmit. 請求項１又は２に記載の電気光学装置において、前記突出体は、前記表示パネルの光が透過する開口部を囲むように土手状に形成されていることを特徴とする電気光学装置。   3. The electro-optical device according to claim 1, wherein the protrusion is formed in a bank shape so as to surround an opening through which light of the display panel is transmitted. 請求項１〜３のいずれかに記載の電気光学装置において、前記突出体の頂部が平面になっていると共に、その平面部は、その光学特性が表示の目的に応じて最適化されていることを特徴とする電気光学装置。   4. The electro-optical device according to claim 1, wherein a top portion of the projecting body is a flat surface, and the optical properties of the flat surface portion are optimized in accordance with a display purpose. An electro-optical device. 請求項１〜３のいずれかに記載の電気光学装置において、前記突出体の表面は、白色の光拡散特性を有すると共に、前記電気光学装置に白色表示した際の表示面の白色度が５５％以上であることを特徴とする電気光学装置。   4. The electro-optical device according to claim 1, wherein the surface of the protruding body has a white light diffusion characteristic, and whiteness of a display surface when white display is performed on the electro-optical device is 55%. An electro-optical device characterized by the above. 請求項１〜３のいずれかに記載の電気光学装置において、前記突出体の表面は、白色の光拡散特性を有すると共に、前記電気光学装置に白色表示した際の表示面の白色度が７５％以上であることを特徴とする電気光学装置。   4. The electro-optical device according to claim 1, wherein the surface of the projecting body has a white light diffusion characteristic, and a whiteness of a display surface when white display is performed on the electro-optical device is 75%. An electro-optical device characterized by the above.
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