JPH09304617A - Semi-transmissive semi-reflective plate, semi-transmissive semi-reflective polarizing plate, and semi-transmissive semi-reflective liquid crystal display device - Google Patents
Semi-transmissive semi-reflective plate, semi-transmissive semi-reflective polarizing plate, and semi-transmissive semi-reflective liquid crystal display deviceInfo
- Publication number
- JPH09304617A JPH09304617A JP8120357A JP12035796A JPH09304617A JP H09304617 A JPH09304617 A JP H09304617A JP 8120357 A JP8120357 A JP 8120357A JP 12035796 A JP12035796 A JP 12035796A JP H09304617 A JPH09304617 A JP H09304617A
- Authority
- JP
- Japan
- Prior art keywords
- semi
- transmissive
- reflective
- liquid crystal
- angle
- 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 23
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 238000010030 laminating Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 21
- 239000010408 film Substances 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 210000002858 crystal cell Anatomy 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000007740 vapor deposition Methods 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000003522 acrylic cement Substances 0.000 description 2
- 229920000180 alkyd Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000007756 gravure coating Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000004 White lead Inorganic materials 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- RYZCLUQMCYZBJQ-UHFFFAOYSA-H lead(2+);dicarbonate;dihydroxide Chemical compound [OH-].[OH-].[Pb+2].[Pb+2].[Pb+2].[O-]C([O-])=O.[O-]C([O-])=O RYZCLUQMCYZBJQ-UHFFFAOYSA-H 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011146 organic particle Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 238000000807 solvent casting Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Laminated Bodies (AREA)
- Optical Elements Other Than Lenses (AREA)
- Polarising Elements (AREA)
Abstract
(57)【要約】
【課題】 半透過半反射型液晶表示装置に用いた場合
に、反射型での使用の際に外光の写り込みを避けた角度
から見て、明るく視認性が優れている半透過半反射板を
提供する。
【解決手段】 正反射角度から５度以上ずれた角度で反
射光量が最大となる反射光量分布特性を有することを特
徴とする半透過半反射板およびこれを装着した半透過半
反射型液晶表示装置。(57) 【Abstract】 PROBLEM TO BE SOLVED: When used in a semi-transmissive semi-reflective liquid crystal display device, it is bright and has excellent visibility when viewed from an angle that avoids reflection of external light when used in a reflective type. Provide a semi-transmissive semi-reflective plate. A semi-transmissive semi-reflective plate and a semi-transmissive semi-reflective liquid crystal display device equipped with the semi-transmissive semi-reflective plate, which has a reflected light amount distribution characteristic that maximizes the amount of reflected light at an angle deviated from the regular reflection angle by 5 degrees or more. .
Description
【０００１】[0001]
【発明の属する技術分野】本発明は新規な反射光量分布
特性を有する半透過半反射板、半透過半反射型偏光板及
び半透過半反射型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 semi-transmissive / semi-reflective plate, a semi-transmissive / semi-reflective type polarizing plate and a semi-transmissive / semi-reflective type liquid crystal display device having a novel reflected light quantity distribution characteristic.
【０００２】[0002]
【従来の技術】近年、液晶表示装置はノート型ワープ
ロ、パソコンの他、電子手帳、携帯情報端末機、アミュ
ーズメント機器、文具器、携帯電話機等、多方面で利用
されている。これらのうちで携帯機器は半透過半反射型
液晶表示装置が多く用いられている。半透過半反射板は
昼間又は明るい場所では反射型として使い、夜間又は暗
い場所ではバックライトを用いた透過型として用いる。
半透過半反射型液晶表示装置として、第１偏光板／液晶
セル（ＴＮセル、ＳＴＮセル）／第２偏光板／半透過半
反射板／バックライトの構成で配置したものが知られて
いる。2. Description of the Related Art In recent years, liquid crystal display devices have been used in various fields such as notebooks, personal computers, electronic notebooks, portable information terminals, amusement machines, stationery, mobile phones, and the like. Among these, a semi-transmissive semi-reflective liquid crystal display device is often used as a mobile device. The semi-transmissive semi-reflective plate is used as a reflective type in the daytime or in a bright place, and is used as a transmissive type using a backlight in the night or in a dark place.
As a semi-transmissive / semi-reflective liquid crystal display device, there is known a device having a configuration of a first polarizing plate / liquid crystal cell (TN cell, STN cell) / second polarizing plate / semi-transmissive semi-reflecting plate / backlight.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、いずれ
の表示装置も反射型で使用する場合、表示装置の最表
面、例えば第１偏光板での外光の反射を避けた角度から
表示を見ると、視認性が低いという課題を有している。However, when any of the display devices is used as a reflection type, when viewing the display from an angle avoiding reflection of external light on the outermost surface of the display device, for example, the first polarizing plate, It has a problem of low visibility.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、かかる課
題を解決するために鋭意検討した結果、新規な反射光量
分布特性を有する半透過半反射板を用いることにより、
かかる課題が解決できることを見い出し、本発明に到達
した。Means for Solving the Problems The inventors of the present invention have made extensive studies to solve the above problems, and as a result, by using a semi-transmissive semi-reflective plate having a novel reflected light quantity distribution characteristic,
The inventors have found that such problems can be solved and have reached the present invention.
【０００５】すなわち本発明は、正反射角度から５度以
上ずれた角度で反射光量が最大となる反射光量分布を有
することを特徴とする半透過半反射板、この半透過半反
射板を積層してなる半透過半反射型偏光板、及び該半透
過半反射板を装着したことを特徴とする半透過半反射型
液晶表示装置である。本発明の半透過半反射板を用いる
ことにより、反射型で使用するに際し、外光の写り込み
を避けた角度から見た場合、明るく視認性の良好な反射
表示を得ることができる。That is, according to the present invention, a semi-transmissive semi-reflective plate characterized by having a reflected light amount distribution that maximizes the amount of reflected light at an angle deviated from the regular reflection angle by 5 degrees or more, and the semi-transmissive semi-reflective plate is laminated. A semi-transmissive / semi-reflective liquid crystal display device, comprising: the semi-transmissive / semi-reflective polarizing plate and the semi-transmissive / semi-reflective plate. By using the semi-transmissive-semi-reflective plate of the present invention, it is possible to obtain a reflective display which is bright and has good visibility when viewed from an angle avoiding reflection of external light when used in a reflective type.
【０００６】[0006]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明の半透過半反射板は、従来の半透過半反射板とは
異なる反射光量分布特性を有し、図１で説明すると、半
透過半反射板への光の入射角度をθ（０度＜θ＜９０
度）とすると正反射角度はθであり、反射光量の角度依
存性を測定した場合に、反射光量が最大となる反射角度
をθ’（０度＜θ’＜９０度）とすると、｜θ−θ’｜
≧５度なる条件を満足するものである。このことにより
反射表示の視認性が良好になる。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
The semi-transmissive semi-reflective plate of the present invention has a reflected light amount distribution characteristic different from that of the conventional semi-transmissive semi-reflective plate. In FIG. 1, the incident angle of light to the semi-transmissive semi-reflective plate is θ (0 degree). <Θ <90
Angle), the regular reflection angle is θ, and when the angle dependence of the reflected light amount is measured and the reflection angle at which the reflected light amount is maximum is θ ′ (0 ° <θ ′ <90 °), | θ −θ '｜
The condition of ≧ 5 degrees is satisfied. This improves the visibility of the reflective display.
【０００７】｜θ−θ’｜≧５度なる反射光量分布特性
を有する半透過半反射板の例を以下に示す。 （１）半透過半反射板表面部が、三角柱が稜線方向に隣
接して配列した形状であって、その断面は三角形が連な
った鋸刃状をしており、表面が水平面となす仰角が２．
５度以上である半透過半反射板（図２、図３）。図２は
実施例で用いた反射板の一例を示す図である。表面部は
三角柱が稜線方向に隣接して配列した形状をしており、
断面は三角形が連なった鋸刃状をしており、反射面の仰
角は７．５度、頂角は８２．５度である。図３は表面部
は三角柱が稜線方向に隣接して配列した形状をしてお
り、断面は二等辺三角形が連なった鋸刃状をしており、
反射面の仰角は７．５度、頂角は１６５度である。該断
面の三角形のピッチは特に限定はないが、１０μｍから
５００μｍが好ましい。１０μｍ以下では規則的な形状
が得られにくく、５００μｍより大きいとスジが目立ち
好ましくない。液晶表示装置とした場合のモアレ縞の発
生を防ぐため、液晶セルのドットピッチと同一のピッチ
とする、隣接する三角形の底辺の長さを違える、又はピ
ッチを１００μｍ以下にすることが好ましい。An example of a semi-transmissive semi-reflective plate having a reflected light quantity distribution characteristic of | θ−θ ′ | ≧ 5 degrees is shown below. (1) The surface of the semi-transmissive semi-reflecting plate has a shape in which triangular prisms are arranged adjacent to each other in the ridge direction, and its cross section has a saw-tooth shape in which triangles are continuous, and the elevation angle formed by the surface with a horizontal plane is 2 ．
Semi-transmissive / semi-reflector plate with an angle of 5 degrees or more (FIGS. 2 and 3). FIG. 2 is a diagram showing an example of the reflector used in the examples. The surface part has a shape in which triangular prisms are arranged adjacent to each other in the ridge direction,
The cross section has a saw-tooth shape in which triangles are continuous, and the reflection surface has an elevation angle of 7.5 degrees and an apex angle of 82.5 degrees. In FIG. 3, the surface portion has a shape in which triangular prisms are arranged adjacent to each other in the ridge direction, and the cross section has a saw-tooth shape in which isosceles triangles are connected,
The reflection surface has an elevation angle of 7.5 degrees and an apex angle of 165 degrees. The triangle pitch of the cross section is not particularly limited, but is preferably 10 μm to 500 μm. If it is 10 μm or less, it is difficult to obtain a regular shape, and if it is more than 500 μm, streaks are conspicuous, which is not preferable. In order to prevent the occurrence of moire fringes in the case of a liquid crystal display device, it is preferable that the dot pitch be the same as that of the liquid crystal cell, that the base lengths of adjacent triangles be different, or that the pitch be 100 μm or less.
【０００８】（２）表面が水平面となす仰角又は伏角が
２．５度以上であり、非対称の断面形状を有する凹又は
凸の群が全面にわたって形成されている半透過半反射板
（図４）。非対称な形状の凹又は凸が全面にわたって形
成されていることが必要であり、半球のような対称的な
凹又は凸では本発明の反射特性は得られないし、また凹
又は凸の数が少なくて平面部が多いと本発明の反射特性
は得られず、全面にわたって形成されていることが好ま
しい。凹又は凸の形状は、その頂部が鋭角になっている
必要はなく、丸みをおびていても良く、非対称の断面形
状を有し、表面が水平面となす仰角又は伏角が２．５度
以上であるものであれば良い。(2) A semi-transmissive semi-reflecting plate whose surface has an elevation angle or dip angle of 2.5 degrees or more with a horizontal plane and in which concave or convex groups having an asymmetrical cross-sectional shape are formed over the entire surface (FIG. 4). . It is necessary that asymmetrical concaves or convexes are formed over the entire surface, and a symmetrical concave or convex such as a hemisphere cannot obtain the reflection characteristics of the present invention, and the number of concaves or convexes is small. If there are many flat portions, the reflection characteristics of the present invention cannot be obtained, and it is preferable that the flat portions are formed over the entire surface. The concave or convex shape does not need to have a sharp top, may be rounded, has an asymmetric cross-sectional shape, and has an elevation angle or dip angle of 2.5 degrees or more with the surface being horizontal. Anything is fine.
【０００９】（３）表面部が多角錘が底辺を接して密集
して配列した構造を有する半透過半反射板。図５はその
一例であり、四角錐が底辺を隣接して密集した構造であ
る。(3) A semi-transmissive semi-reflective plate having a structure in which polygonal pyramids are arranged in a densely arranged manner with their bottom sides in contact with each other at their bases. FIG. 5 shows an example thereof, which has a structure in which quadrangular pyramids are densely arranged with their bases adjacent to each other.
【００１０】半透過半反射板の基材としては、例えば、
ポリエチレンテレフタレートフィルム、ポリエステルフ
ィルム、ポリカーボネートフィルム、ポリアクリルフィ
ルム、ポリオレフィンフィルム等の透明または半透明プ
ラスチックフィルム、ガラス板等の透明または半透明板
が挙げられる。基材の厚みは特に制限されないが、例え
ば、２０μｍ〜５ｍｍ程度である。The base material of the semi-transmissive / semi-reflective plate is, for example,
Examples thereof include transparent or translucent plastic films such as polyethylene terephthalate film, polyester film, polycarbonate film, polyacrylic film and polyolefin film, and transparent or translucent plates such as glass plate. The thickness of the base material is not particularly limited, but is, for example, about 20 μm to 5 mm.
【００１１】基材表面部を上記の形状にする方法とし
て、例えば、下記の方法等が挙げられる。 ロールに目的とする形状のネガ型を形成しておき、
ロール転写法にて形状を付与する方法。 ロールに目的とする形状のネガ型を形成しておき、
紫外線または電子線硬化樹脂を塗布し凹部に充填後、樹
脂液を介してロール凹版上に透明基材フィルムを被覆し
たまま紫外線または電子線を照射し、硬化させた樹脂と
それが接着した基材フィルムとをロール凹版から剥離す
る方法。 目的とする形状のネガ型を流延ベルトに形成してお
き、キャスティング時に目的とする形状を付与する溶剤
キャスト法。Examples of the method for forming the surface portion of the base material include the following methods. A negative mold of the desired shape is formed on the roll,
A method of giving a shape by a roll transfer method. A negative mold of the desired shape is formed on the roll,
UV or electron beam curable resin is applied and filled in the recesses, and then UV or electron beams are radiated while the transparent substrate film is covered on the roll intaglio plate through the resin liquid, and the cured resin and the substrate to which it is adhered A method of peeling the film from the roll intaglio. A solvent casting method in which a negative mold having a desired shape is formed on a casting belt, and the desired shape is imparted during casting.
【００１２】反射光を適度に散乱させるために該形状の
表面を粗らす場合もあり、その方法として、例えば、下
記の方法が挙げられる。 ネガ型の版の表面をあらかじめ粗しておく方法。 有機／無機微粒子を混合させた樹脂をネガ型の版に
押しあてる方法。 目的とする形状を作成した後、表面をサンドブラス
ト処理する方法。 目的とする形状を作成した後、無機／有機微粒子含
有塗工液を表面にコートする方法等がある。In some cases, the surface of the shape is roughened in order to appropriately scatter the reflected light. Examples of the method include the following methods. A method of roughening the surface of a negative type plate in advance. A method of pressing a resin mixed with organic / inorganic particles against a negative plate. A method of sandblasting the surface after creating the desired shape. After forming the desired shape, there is a method of coating the surface with an inorganic / organic fine particle-containing coating liquid.
【００１３】基材表面は、以下の方法で半透過半反射層
を形成する。 （１）アルミニウム、銀等の高反射率の金属を蒸着する
方法。 高反射率の金属を蒸着する方法及び蒸着の厚さは蒸着に
より基材表面の反射光量分布特性が変化せず、｜θ−
θ’｜≧５度なる条件が満たされておれば何ら制約はな
く、例えば、真空蒸着法、スパッタリング法、イオンプ
レーティング法等の通常、金属薄膜を形成するために使
用されている方法を基材の種類に応じて適宜選択して用
いることができる。蒸着の厚みは、例えば、５０Å〜４
００Å程度である。A semi-transmissive semi-reflective layer is formed on the surface of the substrate by the following method. (1) A method of depositing a metal having a high reflectance such as aluminum or silver. The method of depositing a metal having a high reflectance and the thickness of the deposit are such that the characteristics of the distribution of the reflected light amount on the surface of the base material do not change due to the deposition.
There is no restriction as long as the condition of θ ′ | ≧ 5 degrees is satisfied. For example, a method generally used for forming a metal thin film, such as a vacuum deposition method, a sputtering method, an ion plating method, is used. It can be appropriately selected and used according to the type of material. The thickness of vapor deposition is, for example, 50Å to 4
It is about 00 °.
【００１４】高反射率特性を有する金属として銀を用い
て蒸着を行った場合は、蒸着層の劣化を防止するため、
銀蒸着層の表面に保護膜を設けることが好ましい。保護
膜として特に限定はないが、例えば、アクリル樹脂、エ
ポキシ樹脂、ポリエステル樹脂、ウレタン樹脂、アルキ
ド樹脂の塗工膜が挙げられ、例えば、ロールコーティン
グ、グラビアコーティング、スプレーコーティング等の
通常の方法で塗工することができる。また、ＳｉＯ2 な
どの無機物の薄膜を用いることもできる。保護膜の厚さ
は特に制限はないが、例えば、５ｎｍ〜１０μｍの範囲
である。When vapor deposition is performed using silver as a metal having a high reflectance characteristic, in order to prevent deterioration of the vapor deposition layer,
It is preferable to provide a protective film on the surface of the silver vapor deposition layer. The protective film is not particularly limited, and examples thereof include a coating film of an acrylic resin, an epoxy resin, a polyester resin, a urethane resin, and an alkyd resin.Examples include coating by a usual method such as roll coating, gravure coating, and spray coating. Can be engineered. Also, a thin film of an inorganic material such as SiO 2 can be used. The thickness of the protective film is not particularly limited, but is in the range of 5 nm to 10 μm, for example.
【００１５】（２）金属粉末及び／又は金属酸化物粉末
を樹脂バインダーを介してコーティングする方法。 粉末としてアルミニウム、酸化アルミニウム、酸化チタ
ンのような光沢性を有するものであれば特に限定しな
い。樹脂バインダーとして特に限定はないが、例えば、
アクリル系樹脂、ウレタン系樹脂、エポキシ系樹脂、ポ
リエステル系樹脂、アルキド樹脂等が挙げられ、例え
ば、ロールコーティング、グラビアコーティング、スプ
レーコーティング等の通常の方法で塗工することができ
る。コーティング厚みは５μｍ〜２００μｍ程度であ
る。該樹脂バインダーは粘着特性を有していても良い。 （３）光沢性を有する無機および／または有機微粒子を
樹脂バイダーを介してコーティングする方法。 光沢性を有する無機および／または有機微粒子として
は、例えば、二酸化チタンを被覆した合成または天然雲
母等のパール顔料、板状魚鱗箔、六角板状塩基性炭酸鉛
のような真珠光沢を有する微粒子であり、特に限定され
ない。樹脂バインダーも上述のように特に限定はない。(2) A method of coating metal powder and / or metal oxide powder through a resin binder. The powder is not particularly limited as long as it has gloss such as aluminum, aluminum oxide, and titanium oxide. The resin binder is not particularly limited, for example,
Acrylic resins, urethane resins, epoxy resins, polyester resins, alkyd resins and the like can be mentioned, and they can be applied by a usual method such as roll coating, gravure coating or spray coating. The coating thickness is about 5 μm to 200 μm. The resin binder may have adhesive properties. (3) A method of coating inorganic and / or organic fine particles having gloss through a resin binder. Examples of the inorganic and / or organic fine particles having luster include pearl pigments such as synthetic or natural mica coated with titanium dioxide, tabular fish scale foil, and hexagonal tabular basic lead carbonate. There is no particular limitation. The resin binder is not particularly limited as described above.
【００１６】本発明の半透過半反射板を公知のアクリル
系接着剤で貼合して偏光板に積層し、ＴＮ型、ＳＴＮ型
等の反射型液晶表示装置に適した半透過半反射型偏光板
とすることができる。そして、このような半透過半反射
型偏光板を液晶表示装置に装着することにより、視認性
が優れた半透過半反射型液晶表示装置（偏光板／液晶セ
ル／（偏光板／半透過半反射板）バックライト）が得ら
れる。The semi-transmissive / semi-reflective plate of the present invention is laminated with a known acrylic adhesive and laminated on a polarizing plate, and the semi-transmissive / semi-reflective polarized light suitable for a reflective liquid crystal display device of TN type, STN type, etc. It can be a board. By attaching such a semi-transmissive / semi-reflective polarizing plate to a liquid crystal display device, a semi-transmissive / semi-reflective liquid crystal display device (polarizing plate / liquid crystal cell / (polarizing plate / semi-transmissive / semi-reflective film) with excellent visibility is provided. Board) backlight) is obtained.
【００１７】[0017]
【発明の効果】本発明の半透過半反射板を用いた半透過
半反射型液晶表示装置は、反射型で使用した場合、従来
の液晶表示装置に比べ、外光の写り込みを避けた角度か
ら見ると、明るく視認性が優れている。The semi-transmissive / semi-reflective liquid crystal display device using the semi-transmissive / semi-reflecting plate of the present invention, when used in a reflective type, has an angle that avoids reflection of external light as compared with the conventional liquid crystal display device. Seen from above, it is bright and has excellent visibility.
【００１８】[0018]
【実施例】以下、実施例により本発明をさらに詳細に説
明するが、本発明は実施例に限定されるものではない。
なお、表面の反射光量分布曲線は自動変角光度計（村上
色彩社製 ＧＰ−２００）を用いて測定した。中心線平
均粗さの値（Ｒａ値）は表面粗さ計（ｄｅｋｔａｃ社製
３ＳＴ）を用いて測定した。全光線透過率は反射透過測
定装置（村上色彩社製ＨＲ−１００）を用いて測定し
た。The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the examples.
The distribution curve of the amount of reflected light on the surface was measured using an automatic goniophotometer (GP-200 manufactured by Murakami Color Co., Ltd.). The value of the center line average roughness (Ra value) was measured using a surface roughness meter (3ST manufactured by dektac). The total light transmittance was measured using a reflection / transmission measuring device (HR-100 manufactured by Murakami Color Co., Ltd.).
【００１９】実施例１ 図２に示すような表面部が三角柱が稜線方向に隣接して
配列した形状をしており、その断面の形状が、仰角が
７．５度、頂角が８２．５度、繰り返しピッチ２００μ
ｍの鋸刃状であるプラスチックシート（大日本印刷
（株）製）を基材とし、該基材の凹凸面にパール顔料
（Iriodin ：メルク社製）を３０ｗｔ％含有したアクリ
ル系樹脂を塗工し、半透過半反射板を得た。この半透過
半反射板の全光線透過率は３５％であった。この半透過
半反射板について、法線に対して４５度の角度で光を入
射し、反射光量の角度依存性を測定した。結果を図６に
示す。反射光量が最大となる角度は法線から６０度であ
った。正反射角度は４５度であり、そこからのずれは１
５度である。Example 1 As shown in FIG. 2, the surface portion has a shape in which triangular prisms are arranged adjacent to each other in the ridge direction, and the cross-sectional shape has an elevation angle of 7.5 degrees and an apex angle of 82.5. Degree, repeat pitch 200μ
m sawtooth-shaped plastic sheet (manufactured by Dai Nippon Printing Co., Ltd.) as a base material, and an acrylic resin containing 30 wt% of a pearl pigment (Iriodin: Merck) on the uneven surface of the base material. Then, a transflective plate was obtained. The total light transmittance of this semi-transmissive semi-reflective plate was 35%. With respect to this semi-transmissive semi-reflective plate, light was incident at an angle of 45 degrees with respect to the normal line, and the angle dependence of the amount of reflected light was measured. FIG. 6 shows the results. The angle at which the amount of reflected light was maximum was 60 degrees from the normal. The regular reflection angle is 45 degrees, and the deviation from that is 1
5 degrees.
【００２０】この半透過半反射板をアクリル系粘着剤を
介して偏光板（スミカランＳＧ：住友化学工業（株）
製）と張り合わせて半透過半反射型偏光板（偏光板／反
射板）とした。この半透過半反射型偏光板をＴＮ液晶セ
ルに装着し、その反対側に偏光板（スミカランＳＧ：住
友化学工業（株）製）を装着して半透過半反射型ＴＮ液
晶表示装置（偏光板／液晶セル／偏光板／半透過半反射
板）を得た。この液晶表示装置を駆動させたところ、外
光の写り込みを避けた角度から見た場合に明るく、視認
性が良かった。また、暗室でバックライトを通してみて
も明るく視認性が良かった。A polarizing plate (Sumikaran SG: Sumitomo Chemical Co., Ltd.) is provided with this semi-transmissive semi-reflective plate via an acrylic adhesive.
(Manufactured by Mfg. Co., Ltd.) to obtain a semi-transmissive / semi-reflective polarizing plate (polarizing plate / reflecting plate). This semi-transmissive semi-reflective polarizing plate is mounted on a TN liquid crystal cell, and a polarizing plate (Sumikaran SG: manufactured by Sumitomo Chemical Co., Ltd.) is mounted on the opposite side of the TN liquid crystal cell. / Liquid crystal cell / polarizing plate / semi-transmissive semi-reflective plate) was obtained. When this liquid crystal display device was driven, it was bright and had good visibility when viewed from an angle avoiding reflection of external light. Also, it was bright and easy to see when viewed through a backlight in a dark room.
【図１】半透過半反射板への光線の入射角度、反射角度
を示す図である。FIG. 1 is a diagram showing incident angles and reflection angles of light rays on a semi-transmissive semi-reflective plate.
【図２】本発明の実施例１で用いた半透過半反射板の斜
視図である。FIG. 2 is a perspective view of a semi-transmissive semi-reflective plate used in Example 1 of the present invention.
【図３】本発明の半透過半反射板の一例を示す斜視図で
ある。FIG. 3 is a perspective view showing an example of a semi-transmissive semi-reflective plate of the present invention.
【図４】本発明の半透過半反射板の一例を示す斜視図で
ある。FIG. 4 is a perspective view showing an example of a semi-transmissive semi-reflective plate of the present invention.
【図５】本発明の半透過半反射板の一例を示す斜視図で
ある。FIG. 5 is a perspective view showing an example of a semi-transmissive semi-reflective plate of the present invention.
【図６】本発明の実施例１で得られた反射板の反射光量
分布曲線を示す図である。FIG. 6 is a diagram showing a reflected light amount distribution curve of the reflector obtained in Example 1 of the present invention.
Claims (6)
射光量が最大となる反射光量分布特性を有することを特
徴とする半透過半反射板。1. A semi-transmissive semi-reflecting plate having a reflected light amount distribution characteristic in which the reflected light amount becomes maximum at an angle deviated from the regular reflection angle by 5 degrees or more.
接して配列した形状であって、その断面が三角形が連な
った鋸刃状をしており、表面が水平面となす仰角が２．
５度以上である請求項１記載の半透過半反射板。2. The surface of the reflector has a shape in which triangular prisms are arranged adjacent to each other in the ridge direction, and its cross section has a saw-tooth shape in which triangles are continuous, and the elevation angle of the surface to a horizontal plane is 2.
The semi-transmissive semi-reflective plate according to claim 1, which is at least 5 degrees.
５度以上であり、非対称の断面形状を有する凹又は凸の
群が全面にわたって形成されている請求項１または請求
項２記載の半透過半反射板。3. The elevation angle or dip angle of the surface to the horizontal plane is 2.
The semi-transmissive semi-reflective plate according to claim 1 or 2, wherein a group of concaves or convexes having an asymmetric cross-sectional shape of 5 degrees or more is formed over the entire surface.
半透過半反射板を偏光板に積層してなる半透過半反射型
偏光板。4. A semi-transmissive / semi-reflective type polarizing plate which is obtained by laminating the semi-transmissive / semi-reflective plate according to claim 1, 2 or 3 on a polarizing plate.
装着したことを特徴とする半透過半反射型ＴＮ液晶表示
装置。5. A transflective TN liquid crystal display device, comprising the transflective polarizing plate according to claim 4.
装着したことを特徴とする半透過半反射型ＳＴＮ液晶表
示装置。6. A semi-transmissive semi-reflective STN liquid crystal display device comprising the transflective semi-reflective polarizing plate according to claim 4.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8120357A JPH09304617A (en) | 1996-05-15 | 1996-05-15 | Semi-transmissive semi-reflective plate, semi-transmissive semi-reflective polarizing plate, and semi-transmissive semi-reflective liquid crystal display device |
| DE69632138T DE69632138D1 (en) | 1995-07-28 | 1996-07-26 | REFLECTIVE PLATE, REFLECTIVE POLARIZER AND REFLECTIVE LIQUID CRYSTAL DISPLAY DEVICE |
| PCT/JP1996/002119 WO1997005521A1 (en) | 1995-07-28 | 1996-07-26 | Reflecting plate, reflection type polarizing plate and reflection type liquid crystal display device |
| EP96925110A EP0843195B1 (en) | 1995-07-28 | 1996-07-26 | Reflecting plate, reflection type polarizing plate and reflection type liquid crystal display device |
| US09/000,457 US6204903B1 (en) | 1995-07-28 | 1996-07-26 | Reflector, reflective polarizing plate and reflective liquid crystal display |
| KR10-1998-0700558A KR100419946B1 (en) | 1995-07-28 | 1996-07-26 | Reflecting plate, reflection type polarizing plate and reflection type liquid crystal display devive |
| TW085109344A TW422934B (en) | 1995-07-28 | 1996-08-02 | Reflecting plate, reflection type polarizing plate and reflection type liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8120357A JPH09304617A (en) | 1996-05-15 | 1996-05-15 | Semi-transmissive semi-reflective plate, semi-transmissive semi-reflective polarizing plate, and semi-transmissive semi-reflective liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09304617A true JPH09304617A (en) | 1997-11-28 |
Family
ID=14784216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8120357A Pending JPH09304617A (en) | 1995-07-28 | 1996-05-15 | Semi-transmissive semi-reflective plate, semi-transmissive semi-reflective polarizing plate, and semi-transmissive semi-reflective liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09304617A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000329916A (en) * | 1998-09-16 | 2000-11-30 | Sumitomo Chem Co Ltd | Transflective reflector |
| JP3744422B2 (en) * | 1999-11-09 | 2006-02-08 | オムロン株式会社 | Reflecting member and manufacturing method thereof |
| JP2008210787A (en) * | 2007-02-01 | 2008-09-11 | Matsushita Electric Ind Co Ltd | Secondary battery, inspection method for its negative electrode, inspection device, manufacturing method, and manufacturing device |
| US7820252B2 (en) | 2001-07-02 | 2010-10-26 | Sumitomo Chemical Company, Limited | Transflective film, transflective polarizer, and polarizing light source device and liquid crystal display device using the same |
| JP2011022565A (en) * | 2009-06-17 | 2011-02-03 | Keiwa Inc | Translucent reflection sheet, and backlight unit employing the same |
| US8896923B2 (en) | 2006-05-10 | 2014-11-25 | Oji Holdings Corporation | Corrugated pattern forming sheet, and methods for manufacturing antireflector, retardation plate, original process sheet plate, and optical element |
-
1996
- 1996-05-15 JP JP8120357A patent/JPH09304617A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000329916A (en) * | 1998-09-16 | 2000-11-30 | Sumitomo Chem Co Ltd | Transflective reflector |
| JP3744422B2 (en) * | 1999-11-09 | 2006-02-08 | オムロン株式会社 | Reflecting member and manufacturing method thereof |
| US7820252B2 (en) | 2001-07-02 | 2010-10-26 | Sumitomo Chemical Company, Limited | Transflective film, transflective polarizer, and polarizing light source device and liquid crystal display device using the same |
| US8896923B2 (en) | 2006-05-10 | 2014-11-25 | Oji Holdings Corporation | Corrugated pattern forming sheet, and methods for manufacturing antireflector, retardation plate, original process sheet plate, and optical element |
| JP2008210787A (en) * | 2007-02-01 | 2008-09-11 | Matsushita Electric Ind Co Ltd | Secondary battery, inspection method for its negative electrode, inspection device, manufacturing method, and manufacturing device |
| JP2011022565A (en) * | 2009-06-17 | 2011-02-03 | Keiwa Inc | Translucent reflection sheet, and backlight unit employing the same |
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