JPH085835A - Reflection plate, reflection type polarizing plate and reflection type liquid crystal display device - Google Patents

Reflection plate, reflection type polarizing plate and reflection type liquid crystal display device

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Publication number
JPH085835A
JPH085835A JP14367994A JP14367994A JPH085835A JP H085835 A JPH085835 A JP H085835A JP 14367994 A JP14367994 A JP 14367994A JP 14367994 A JP14367994 A JP 14367994A JP H085835 A JPH085835 A JP H085835A
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reflection
deg
theta
lt
plate
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JP3536353B2 (en )
Inventor
Shigetoshi Hayashi
Nobuyuki Kurata
成年 林
信行 蔵田
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Sumitomo Chem Co Ltd
住友化学工業株式会社
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Abstract

PURPOSE:To obtain a reflection type liquid crystal display device which is bright and has good visibility when viewed from an angle averting glittering by using a reflection plate having the maximal point of reflectivity in a position apart a specific angle or above from a specular reflection angle at a reflected light quantity distribution curve. CONSTITUTION:The reflection plate having the maximal point of reflectivity in the position deviating >=2 deg. from the specular reflection angle at the reflected light quantity distribution curve is used. Namely, this reflection plate has the maximal point satisfying the conditions ¦theta-theta'¦>=2 deg. when the incident angle of light on the reflection plate is defined as theta(0 deg.<theta<90 deg.) and the angle at which the reflectivity is maximal is defined as theta'(0 deg.<theta'<90 deg.) when the light quantity of the reflection quantity is measured. The theta is not particularly limited and is satisfactory, insofar as its value is within a range of 0 deg.<theta<90 deg.. The value in the range of 30 deg.<theta<80 deg. is more preferable. The reflection type polarizing plate suitable for the reflection type liquid crystal display devices of a TN type, STN type, etc., is obtd. by sticking this reflection plate to the polarizing plate.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、新規な反射光量分布特性を有する反射板に関するものである。 The present invention relates to relates to a reflector having a novel reflection light amount distribution characteristic.

【0002】 [0002]

【従来の技術および発明が解決しようとする課題】反射型液晶表示装置としては、第1偏光板/液晶セル/第2 2. Description of the Related Art and Problems to be Solved The reflective liquid crystal display device, a first polarizing plate / liquid crystal cell / second
偏光板/反射板の構成で反射板を配置したもの(TN Those arranged a reflector in the configuration of the polarizing plate / reflector (TN
型、STN型)や、液晶セル/反射板の構成で反射板を配置したもの(GH型)が知られているが、いずれも表示装置の最表面、すなわち第1偏光板もしくは液晶セル表面からの反射光線によるギラつき現象を避けた角度から見ると、視認性が低いという課題を有している。 Type, STN type) and, although that is arranged a reflector in the configuration of the liquid crystal cell / reflector (GH type) is known, the outermost surface of both the display device, i.e. from the first polarizing plate or the surface of a liquid crystal cell Viewed from an angle to avoid glare phenomenon caused by the reflection rays, it has a problem of low visibility.

【0003】 [0003]

【課題を解決するための手段】本発明者らはこのような課題を解決するため鋭意検討を重ねた結果、新規な反射光量分布特性を有する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だし、本発明に到達した。 Means for Solving the Problems The present inventors have result of extensive studies to solve such problems, by using a reflector having a novel reflection light amount distribution characteristic, that such problems can be solved found, we have reached the present invention.

【0004】即ち本発明は、反射光量分布曲線において正反射角度から2度以上ずれた位置に反射率の極大点を有することを特徴とする反射板に関するものであり、本発明の反射板を用いることにより、ギラつき現象を避けた角度から見た場合に、明るく視認性の良好な反射型液晶表示装置を得ることができる。 [0004] The present invention relates to a reflector and having a maximum point of the reflectance at a position of regular reflection angle deviates more than once in the amount of reflected light distribution curve, using a reflector of the present invention it makes it possible to obtain when viewed from an angle to avoid glare phenomenon, a bright good visibility reflective liquid crystal display device.

【0005】以下、本発明を詳細に説明する。 [0005] The present invention is described below in detail. 本発明の反射板は反射光量分布曲線において、正反射角度から2 In reflector reflected light quantity distribution curve of the present invention, 2 a positive reflection angle
度以上ずれた位置に反射率の極大点を有している。 And a maximum point of reflectance degrees shifted position. すなわち、本発明の反射板は、従来の反射板とは異なる反射光量分布曲線を有しており、反射板への光の入射角度をθ(0度<θ<90度)として、反射光の光量を測定した場合、反射率が極大となる角度をθ'(0度<θ'< That is, the reflecting plate of the present invention, the conventional reflector have different amount of reflected light distribution curve, as the incident angle of light to the reflector theta (0 ° <theta <90 °), the reflected light when measuring the amount of light, the angle at which the reflectance becomes maximum theta '(0 ° <theta' <
90度)とする時、|θ−θ'|≧2度なる条件を満たす極大点を有している。 When 90 degrees), | θ-θ '| has ≧ 2 degrees becomes satisfying maximum point. θは特に限定されず、0度<θ θ is not particularly limited, 0 degrees <θ
<90度の範囲の値であればよく、好ましくは30度≦ <It may be a value in the range of 90 degrees, preferably 30 degrees ≦
θ≦80度の範囲の値であればよい。 It may be a value in the range of theta ≦ 80 degrees.

【0006】このような反射光量分布曲線の例としては、例えば、以下のような場合が挙げられる。 [0006] Examples of such reflected light distribution curve, for example, the following case. 正反射角度(θ)で反射率が最大であり、それから2 Reflectance specular angle (theta) is the largest, then 2
度以上ずれた位置に反射率の極大点が存在する(図1参照)。 Maximum point exists in the reflectance degrees shifted position (see FIG. 1). 反射率が最大となる位置が正反射角度から2度未満ずれた位置にあり、正反射角度から2度以上ずれた位置に反射率の極大点が存在する(図2参照)。 Reflectance becomes maximum position is the position shifted less than 2 degrees from a positive reflection angle, maximum point of the reflectance at a position deviated from the regular reflection angle 2 degrees or more is present (see FIG. 2). 反射率が最大となる位置が正反射角度から2度以上ずれている(図3及び図4参照)。 Reflectance is maximum position is shifted twice or more from the specular reflection angle (see FIGS. 3 and 4). そして、<<の順番で好ましい。 Then, it preferred << order.

【0007】本発明の反射板は、例えば、|θ−θ'| [0007] reflector of the present invention, for example, | θ-θ '|
≧2度という反射光量分布曲線を有する基材の表面に、 On the surface of the substrate having a quantity of reflected light distribution curve that ≧ 2 degrees,
アルミニウム、銀等の高反射率特性を有する金属を蒸着することにより製造することができる。 Aluminum, can be produced by depositing a metal having a high reflectivity characteristic such as silver. |θ−θ'|≧ | Θ-θ '| ≧
2度という反射光量分布曲線を有する基材は例えば、 A:平滑又は凹凸形状の表面を有する基材に対し、表面の法線に対して45度以上の角度から、 ・珪酸塩化合物や金属化合物等の微粒子を落下させるか又は吹きあてる方法 ・プラズマを照射する方法 ・レーザを照射する方法 B:凹凸形状の表面を有する基材に対し、表面の法線に対して45度以上の角度から、 ・無機化合物等の化合物を蒸着する方法 C:平滑な表面を有する基材に有機/無機微粒子分散液をコートする際、 ・コート直後に基材を傾斜させる方法 ・コ−ト直後に一方向から送風を行う方法 等により基材表面を修飾して得ることができる。 The substrate for example, having a reflected light quantity distribution curve of twice, A: smooth or to irregularities substrate having a surface of 45 degrees or more angles with respect to the normal of the surface, - silicate compound and a metal compound how irradiating method laser for irradiating the particulate method, plasma shed or blowing dropping the equal B: to a substrate having a textured surface, from 45 degrees or more angles with respect to the normal of the surface, · how depositing a compound of an inorganic compound such as C: when coating the organic / inorganic fine particle dispersion liquid to a substrate having a smooth surface, the method co tilting the substrate immediately after Court - from one direction immediately after preparative by a method for performing the blowing can be obtained by modifying the surface of the substrate.

【0008】基材の種類としては、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プラスチックフィルム、アルミニウム板、銅板等の金属板、ガラス板等が挙げられる。 [0008] As the type of substrate, such as polyethylene terephthalate film, a polyester film, a polycarbonate film, a polyacrylic film, a plastic film such as a polyolefin film, an aluminum plate, a metal plate such as copper plate, a glass plate, and the like. 基材として、アルミニウム板、銅板等の金属板を用いた場合には、高反射率特性を有する金属を蒸着することなく、そのまま反射板として用いることもできる。 As the substrate, in the case of using an aluminum plate, a metal plate such as copper plate, without depositing a metal having a high reflectance characteristic can be used as it is as the reflecting plate.

【0009】なお、上記A、Bで用いた表面が凹凸形状を有している基材は、例えば ・有機/無機微粒子を混合した樹脂を押し出す方法、 ・基材表面をサンドブラスト処理する方法、 ・無機/有機微粒子含有塗工液を基材にコートする方法等 により製造することができる。 [0009] Incidentally, the A, method a surface used in B is a substrate having an uneven shape, the sandblasting method, a-substrate surface extruding the resin mixed with e.g. Organic / inorganic fine particles, - it can be produced by a method such as coating an inorganic / organic fine particle-containing coating liquid to a substrate.

【0010】|θ−θ'|≧2度という反射光量分布曲線を有する基材の厚みは特に制限されないが、例えば、 [0010] | θ-θ '| thickness of the substrate having a quantity of reflected light distribution curve that ≧ 2 degrees is not particularly limited, for example,
10μm 〜5mm程度である。 It is about 10μm ~5mm. 高反射率の金属を蒸着方法する方法及び蒸着層の厚さは、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'|≧2度が満たされておれば何ら制限はなく、例えば、真空蒸着法、 The thickness of the methods and deposition layer deposited method a high reflectivity of the metal, the reflection light quantity distribution properties of the substrate surface is not changed by evaporation, | θ-θ '| any if I have ≧ 2 ° is satisfied restriction rather than, for example, a vacuum deposition method,
スパッタリング法、イオンプレーティング法等の通常、 A sputtering method, an ion plating method, or the like of normal,
金属の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等により適宜選択して用いることができ、蒸着層の厚さは、例えば、50nm〜100nm程度である。 Method used to form a thin film of metal can be suitably selected by the type of substrate, etc., the thickness of the deposited layer, for example, about 50 nm to 100 nm.
反射板は半透明性を有していてもよい。 Reflector may have translucency.

【0011】上記方法で得られた|θ−θ'|≧2度という反射光量分布曲線を有する基材を用い、その表面形状のネガ型形状をロールに形成しておくことにより、以後は、このロ−ルを用いてロ−ル転写法により、|θ− [0011] The above obtained by the method | θ-θ '| By keeping using a substrate having a reflection light quantity distribution curve of ≧ 2 degrees, the negative shape of the surface shape is formed into a roll, is subsequently, by Le transfer method, the b - - with Le b | theta-
θ'|≧2度という反射光量分布曲線を有するプラスチック基材を効率よく製造することができる。 theta '| a plastic substrate having a reflection light quantity distribution curve of ≧ 2 degrees can be efficiently produced.

【0012】PETフィルム等のプラスチックフィルムを溶剤キャスト法で作成する際、流延ベルトの表面に、 [0012] The plastic film such as a PET film when you create a solvent casting method, on the surface of the casting belt,
予め|θ−θ'|≧2度という反射光量分布曲線を示す表面形状のネガ型形状を形成しておくことにより、溶剤キャスト法を用いて、効率よく|θ−θ'|≧2度という反射光量分布曲線を有するプラスチック基材を生産することができる。 Previously | θ-θ '| By forming a negative shape of the surface shape showing the reflection light quantity distribution curve of ≧ 2 times, using a solvent casting method, efficiently | θ-θ' | of ≧ 2 times it is possible to produce a plastic substrate having a reflection light quantity distribution curve.

【0013】|θ−θ'|≧2度という反射光量分布曲線を示す表面形状のネガ型形状が形成された金属板をスタイラスとして用い、これに平滑な表面を有するプラスチック基材を押し当てることによっても、|θ−θ'| [0013] | θ-θ '| a metal plate having negative shape is formed in surface shape showing the reflection light quantity distribution curve of ≧ 2 degrees stylus is pressed against the plastic substrate having a smooth surface thereto by also, | θ-θ '|
≧2度という反射光量分布曲線を有するプラスチック基材を効率よく生産することができる。 The amount of reflected light distribution curve that ≧ 2 degrees can be efficiently produced plastic substrate having.

【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には、蒸着層の劣化を防止するため、銀蒸着層の上に保護膜を設けることが好ましい。 [0014] When the deposition using silver as a metal having a high reflectance characteristic was performed in order to prevent the deterioration of the deposited layer, it is preferable to provide a protective film on the silver deposited layer. 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。 There is no particular limitation as a protective film, for example, acrylic resins, epoxy resins, polyester resins, urethane resins, include coating films of alkyd resins, for example, coating with a roll coating, gravure coating, conventional methods such as spray coating can do. また、SiO 2などの無機物の薄膜を用いることもできる。 It is also possible to use a thin film of inorganic material such as SiO 2. 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。 It is not particularly limited thickness of the protective film, for example, in the range of 5 nm to 10 m.

【0015】本発明の反射板は偏光板と貼合することにより、TN型、STN型等の反射型液晶表示装置に適した反射型偏光板とすることができる。 The reflector of the present invention by laminating the polarizing plate, TN type, may be a reflective polarizer suitable for reflective-type liquid crystal display device of the STN type, or the like. そして、このような反射型偏光板を装着した反射型液晶表示装置(偏光板/液晶セル/(偏光板/反射板)は、ギラつき現象を避けた角度から見た場合に、明るく視認性が優れている。 Then, such a reflective polarizing plate was attached reflective liquid crystal display device (polarizing plate / liquid crystal cell / (polarizing plate / reflector), when viewed from an angle to avoid glare phenomena, bright visibility Are better.

【0016】本発明の反射板をGH型液晶表示装置に用いる場合には、液晶セルの下側に装着してもよいし、また、液晶セルを構成している下側のガラス板又はプラスチック板に代えて、本発明の反射板を用いてもよい。 [0016] The reflector of the present invention is used in GH type liquid crystal display device may be mounted on the lower side of the liquid crystal cell and the lower glass plate or plastic plate constituting the liquid crystal cell instead, it may be a reflection plate of the present invention. いずれの方法によっても、ギラつき現象を避けた角度から見た場合に、明るく視認性に優れたGH型液晶表示装置(ガラス/液晶層/反射板)を得ることができる。 By any method, can be obtained when viewed from an angle to avoid glare phenomena, GH type liquid crystal display device having excellent bright visibility (glass / liquid crystal layer / reflector).

【0017】 [0017]

【発明の効果】本発明の反射板は、反射光量分布曲線において正反射角度から2度以上ずれた位置に反射率の極大点を有するという新規な反射特性を有しており、これを液晶表示装置に装着することにより、ギラつき現象を避けた角度から見た場合に、明るく視認性に優れた反射型液晶表示装置を得ることができる。 Reflector of the present invention according to the present invention has a novel reflective characteristics of having a local maximum point of the reflectance at a position deviated from the regular reflection angle 2 degrees or more in the amount of reflected light distribution curve, the liquid crystal display of this by mounting the device, it can be when viewed from an angle to avoid glare phenomena, obtaining excellent bright visibility reflective liquid crystal display device.

【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、本発明はこれに限定されるものではない。 EXAMPLES The following is a more detailed description of the present invention through examples, the present invention is not limited thereto. 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)で測定した。 The reflection light quantity distribution curve of the surface was measured by an automatic goniophotometer (Murakami Shikisai Co. GP-200).

【0019】実施例1 アルミ板を水平から60°傾斜させて設置し、上部よりNG #80の砂を落下させて表面が修飾されたアルミ板を得た(厚さ1mm)。 [0019] established by 60 ° inclined Example 1 aluminum plate from the horizontal, to obtain an aluminum plate which is surface by dropping the sand NG # 80 from above was modified (thickness 1 mm). 表面の法線に対して45度の角度で光を入射して、反射光量分布曲線を測定したところ、反射率が最大となる角度は43度であった。 45 ° angle to the incident light with respect to the surface normal, was measured reflected light intensity distribution curve, the angle at which the reflectance is maximum was 43 degrees. このアルミ板に、反射光量分布特性を保持しながらアルミニウムを蒸着(厚み約70nm)し、反射板とした(反射率が最大となる角度43度)。 The aluminum plate, the reflected light quantity while maintaining the distribution characteristics by depositing aluminum (thickness of about 70 nm), (angle 43 ° reflectance is maximum) reflection plate and the. 反射板をアクリル系粘着剤を介して偏光板(住友化学工業株式会社製SG−185 Polarizer reflection plate via an acrylic pressure-sensitive adhesive (manufactured by Sumitomo Chemical Co., Ltd. SG-185
2A)と張り合わせて反射型偏光板(偏光板/〔アルミニウム蒸着層/アルミ板〕)とした。 And a reflection type polarizing plate (polarizing plate / [aluminum deposited layer / aluminum plate]) by laminating and 2A). 反射型偏光板を、 A reflection type polarizing plate,
TN型液晶セルに積層し、その反対側に偏光板(住友化学工業株式会社製SG−1852A)を積層して反射型TN液晶表示装置(偏光板/液晶セル/偏光板/〔アルミニウム蒸着層/アルミ板〕)を得た。 TN-type laminated to the liquid crystal cell, opposite to the polarizer reflective type TN liquid crystal display device (manufactured by Sumitomo Chemical Co., Ltd. SG-1852A, Ltd.) was laminated (polarizing plate / liquid crystal cell / polarizer / [aluminum deposited layer / aluminum plate]) was obtained. 反射型液晶表示装置を駆動させたところ、ギラつき現象を避けた角度から見た場合に、明るく視認性に優れていた。 Was driven reflective liquid crystal display device, when viewed from an angle to avoid glare phenomena, was excellent bright visibility.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の反射板の反射光量分布曲線の1例を示す図。 View showing an example of the reflection light quantity distribution curve of the reflector of the present invention; FIG.

【図2】本発明の反射板の反射光量分布曲線の1例を示す図。 View showing an example of the reflection light quantity distribution curve of the reflector of the present invention; FIG.

【図3】本発明の反射板の反射光量分布曲線の1例を示す図。 View showing an example of the reflection light quantity distribution curve of the reflector of the present invention; FIG.

【図4】本発明の反射板の反射光量分布曲線の1例を示す図。 View showing an example of the reflection light quantity distribution curve of the reflector of the present invention; FIG.

Claims (5)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】反射光量分布曲線において正反射角度から2度以上ずれた位置に反射率の極大点を有することを特徴とする反射板。 1. A reflector characterized in that it has a local maximum point of the reflectance at a position of regular reflection angle deviation or twice in the reflection light quantity distribution curve.
  2. 【請求項2】請求項1記載の反射板を偏光板に積層してなる反射型偏光板。 2. A reflection type polarizing plate obtained by laminating a reflector according to claim 1, wherein the polarizing plate.
  3. 【請求項3】請求項2記載の反射型偏光板を装着したことを特徴とする反射型TN液晶表示装置。 3. A reflective type TN liquid crystal display device, characterized in that wearing the reflective polarizer according to claim 2, wherein.
  4. 【請求項4】請求項2記載の反射型偏光板を装着したことを特徴とする反射型STN液晶表示装置。 4. A reflection type STN liquid crystal display characterized in that fitted with reflective polarizer according to claim 2, wherein.
  5. 【請求項5】請求項1記載の反射板を装着したことを特徴とする反射型GH液晶表示装置。 5. The reflective GH liquid crystal display characterized in that fitted with reflector according to claim 1, wherein.
JP14367994A 1994-06-24 1994-06-24 Reflector, a reflective polarizer and a reflection-type liquid crystal display device Expired - Fee Related JP3536353B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6067136A (en) * 1997-07-23 2000-05-23 Citizen Watch Co., Ltd. Birefringence-type color liquid crystal display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6067136A (en) * 1997-07-23 2000-05-23 Citizen Watch Co., Ltd. Birefringence-type color liquid crystal display device

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