JPH01155317A - Reflex type polarizing plate - Google Patents
Reflex type polarizing plateInfo
- Publication number
- JPH01155317A JPH01155317A JP62315735A JP31573587A JPH01155317A JP H01155317 A JPH01155317 A JP H01155317A JP 62315735 A JP62315735 A JP 62315735A JP 31573587 A JP31573587 A JP 31573587A JP H01155317 A JPH01155317 A JP H01155317A
- Authority
- JP
- Japan
- Prior art keywords
- polarizing plate
- aluminum foil
- plate
- reflective
- reflector
- 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
- 230000011514 reflex Effects 0.000 title 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 26
- 239000011888 foil Substances 0.000 claims abstract description 22
- 239000002985 plastic film Substances 0.000 claims abstract description 11
- 229920006255 plastic film Polymers 0.000 claims abstract description 11
- 230000001788 irregular Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000002651 laminated plastic film Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、梨地状の乱反射面を有するアルミニウム箔を
用いた反射板を設けた反射型偏光板に関するものである
。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a reflective polarizing plate provided with a reflective plate made of aluminum foil having a satin-like diffused reflection surface.
従来の技術及び問題点
液晶表示装置等に用いられる偏光板には光が透過するタ
イプと反射するタイプがあり、後者の反射型偏光板は偏
光板に反射層を有する反射板を付設することにより構成
される。Conventional technology and problems There are two types of polarizing plates used in liquid crystal display devices, etc.: a type that transmits light and a type that reflects light. configured.
従来、反射型偏光板における反射板としては、表面にヘ
アライン状の粗面加工を施したアルミニウム箔をプラス
チックフィルムにラミネートしたものが知られていた。BACKGROUND ART Conventionally, as a reflective plate in a reflective polarizing plate, one in which an aluminum foil whose surface is roughened in a hairline pattern is laminated onto a plastic film has been known.
しかしながら、回折効果などのためか反射方向に偏りが
生じやすく、偏光板に明部と暗部のムラができて視認性
に劣る問題点があった。However, there was a problem in that the reflection direction was likely to be biased due to diffraction effects or the like, and the polarizing plate had uneven bright and dark areas, resulting in poor visibility.
一方、プラスチックフィルムにアルミニウムを微細な粒
子塊として蒸着した梨地状の反射面を有する反射板も知
られていた。しかしながら、光吸収率が高くて反射効率
に劣り、偏光板が暗くて視認性に劣る問題点、及び蒸着
アルミニウムが傷つきやす（、加湿条件下で著しく腐食
してピンホールを生じやす（、反射効率の低下が大きい
問題点があった。また、反射板の作製に多方力を要する
問題点もあった。On the other hand, a reflective plate having a satin-like reflective surface is also known, in which aluminum is vapor-deposited in the form of fine particles on a plastic film. However, there are problems in that the light absorption rate is high and the reflection efficiency is poor, the polarizing plate is dark and the visibility is poor, and the vapor-deposited aluminum is easily damaged (it is easily corroded under humidified conditions, causing pinholes), and the reflection efficiency is poor. There was a problem in that there was a large decrease in the reflector.There was also a problem in that multidirectional force was required to fabricate the reflector.
問題点を解決するための手段
本発明は、梨地状に粗面加工したアルミニウム箔により
上記の問題点を克服したものである。Means for Solving the Problems The present invention overcomes the above problems by using an aluminum foil whose surface is roughened into a satin finish.
すなわち、本発明は、反射板を付設してなる偏光板にお
いて、その反射板がアルミニウム箔とブラスチックフィ
ルムとのラミネート板からなり、かつそのアルミニウム
箔が梨地状に粗面加工された乱反射面を有するものであ
ることを特徴とする反射型偏光板を提供するものである
。That is, the present invention provides a polarizing plate equipped with a reflective plate, in which the reflective plate is made of a laminate plate of an aluminum foil and a plastic film, and the aluminum foil has a diffusely reflective surface roughened in a matte finish. The object of the present invention is to provide a reflective polarizing plate characterized by having the following characteristics.
作用
梨地状の粗面を有するアルミニウム箔で反射板を形成す
ることにより、傷っけや湿度等に対する耐性、及び反射
効率に優れるものとすることができると共に、反射方向
の平均性に優れるものとすることができる。By forming the reflector plate with aluminum foil having a satin-like rough surface, it can be made to have excellent resistance to scratches and humidity, and has excellent reflection efficiency, as well as excellent uniformity in the direction of reflection. can do.
実施例
図に例示した反射型偏光板は、偏光板１に反射板２を接
着剤で固着したものからなる。The reflective polarizing plate illustrated in the embodiment diagram consists of a polarizing plate 1 and a reflecting plate 2 fixed with an adhesive.
反射板２は、アルミニウム箔３とプラスチックフィルム
４とを接着剤で固着したラミネート板からなり、そのア
ルミニウム箔３は梨地状に粗面加工された乱反射面を有
するものからなる。このアルミニウム箔３の乱反射面側
を介して反射板２は偏光板１に固着されている。The reflecting plate 2 is made of a laminate plate in which an aluminum foil 3 and a plastic film 4 are fixed together with an adhesive, and the aluminum foil 3 is made of a material having a diffused reflection surface roughened in a matte finish. The reflecting plate 2 is fixed to the polarizing plate 1 via the diffused reflection surface side of the aluminum foil 3.
本発明における偏光板及びプラスチックフィルムについ
ては特に限定はなく、公知のものを用いることができる
。プラスチックフィルムの厚さとしてはｌＯμｓ〜２−
が一般的である。プラスチックフィルムは透明であって
もよいし、不透明であってもよい。There are no particular limitations on the polarizing plate and plastic film in the present invention, and known ones can be used. The thickness of the plastic film is lOμs ~ 2-
is common. The plastic film may be transparent or opaque.
本発明におけるアルミニウム箔は、梨地状に粗面加工さ
れた乱反射面を有するものである。梨地状の粗面加工は
サンドペーパ方式やパフ方式、あるいは粗面ロールを圧
接する方式など適宜な方式で行ってよい。粗面の程度は
反射光の強さが偏光板上で均等化される程度がよ（、一
般には高さが１００ｎ以下、就中１〜５０ｎ程度の凸部
が１−あたりｌＯ〜ｌＯ個存在・する程度の状態である
。アルミニウム箔の粗面加工は、アルミニウム箔をプラ
スチックフィルムにラミネートする前であってもよいし
、ラミネート板とした後であってもよい。アルミニウム
箔の厚さは１〜５００趨が一般である。The aluminum foil in the present invention has a diffusely reflective surface roughened into a matte finish. The matte surface roughening may be performed by any suitable method such as a sandpaper method, a puff method, or a method of pressing a rough surface roll. The degree of roughness is determined by the degree to which the intensity of reflected light is equalized on the polarizing plate (in general, there are 10 to 10 convex portions with a height of 100 nm or less, especially about 1 to 50 nm per 1 -・The roughening of the aluminum foil may be done before laminating the aluminum foil to the plastic film or after it is made into a laminate plate.The thickness of the aluminum foil is 1. ~500 is common.
ちなみに、高さが５〜５０μｍの凸部がｌ■−あたり約
１０ 個存在する状態の粗面からなる乱反射面を設け
た厚さ５０ｎのアルミニウム箔と、厚さ８０μｓのポリ
エステルフィルムをラミネートしてなる反射板を、偏光
板に接着して得た反射型偏光板を６０℃、９５％Ｒ，Ｈ
の加湿雰囲気下に５００時間放置したところ、１００％
の相対反射率（半値幅３０度）を維持する反射特性を示
した。また、腐食によるピンホールの発生も認められな
かった。By the way, an aluminum foil with a thickness of 50n and a polyester film with a thickness of 80μs are laminated with a diffused reflection surface consisting of a rough surface with about 10 protrusions with a height of 5 to 50μm per inch. A reflective polarizing plate obtained by adhering a reflective plate to a polarizing plate was heated at 60°C, 95% R, H
When left in a humidified atmosphere for 500 hours, 100%
It showed a reflection characteristic that maintained a relative reflectance (half width of 30 degrees). Furthermore, no pinholes were observed due to corrosion.
しかし、従来の梨地状のアルミニウム蒸着層を設けたプ
ラスチックフィルムからなる反射板を、同様の偏光板に
接着した反射型偏光板について同じ試験を試みたところ
、その相対反射率は８５％と低下し、アルミニウム蒸着
層に腐食によるピンホールの発生が多数認められた。However, when the same test was performed on a reflective polarizing plate in which a reflective plate made of a plastic film with a conventional satin-like aluminum vapor-deposited layer was adhered to a similar polarizing plate, the relative reflectance decreased to 85%. Many pinholes due to corrosion were observed in the aluminum deposited layer.
発明の効果
本発明の反射型偏光板は、反射板に梨地状の乱反射面を
有するアルミニウム箔のプラスチックフィルムラミネー
ト板を用いたので、加湿雰囲気下でも劣化が少なく反射
効率の高さ及びその維持性に優れ、また反射方向の平均
性が高（偏光板上の明るさの均等性にも優れて、視認性
及び信頼性に優れている。さらに、低労力で容易に製造
できる利点も有している。Effects of the Invention The reflective polarizing plate of the present invention uses a plastic film laminate plate of aluminum foil with a satin-like diffused reflection surface as a reflective plate, so it has low deterioration even in a humid atmosphere and has high reflective efficiency and maintainability. It also has a high averageness in the reflection direction (it also has excellent uniformity of brightness on the polarizing plate, and has excellent visibility and reliability. It also has the advantage of being easy to manufacture with low labor. There is.
図は、本発明の反射型偏光板の構成例を示した部分断面
斜視図である。
１：偏光板
２：反射板
３：梨地状乱反射面を有するアルミ
ニウム箔
４ニブラスチツクフイルム
特許出願人 日東電気工業株式会社The figure is a partially cross-sectional perspective view showing a configuration example of a reflective polarizing plate of the present invention. 1: Polarizing plate 2: Reflecting plate 3: Aluminum foil with satin-like diffused reflection surface 4 Niblast film Patent applicant: Nitto Electric Industry Co., Ltd.
Claims (1)
がアルミニウム箔とプラスチックフィルムとのラミネー
ト板からなり、かつそのアルミニウム箔が梨地状に粗面
加工された乱反射面を有するものであることを特徴とす
る反射型偏光板。1. In a polarizing plate equipped with a reflective plate, the reflective plate is made of a laminate plate of aluminum foil and plastic film, and the aluminum foil has a diffusely reflective surface that is roughened in a matte finish. A reflective polarizing plate featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62315735A JPH01155317A (en) | 1987-12-14 | 1987-12-14 | Reflex type polarizing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62315735A JPH01155317A (en) | 1987-12-14 | 1987-12-14 | Reflex type polarizing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01155317A true JPH01155317A (en) | 1989-06-19 |
Family
ID=18068905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62315735A Pending JPH01155317A (en) | 1987-12-14 | 1987-12-14 | Reflex type polarizing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01155317A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH049514U (en) * | 1990-05-15 | 1992-01-28 | ||
| JP2002052647A (en) * | 2000-08-11 | 2002-02-19 | Tokyo Seitankosho:Kk | Molded object made of light alloy |
| KR100612979B1 (en) * | 2004-08-17 | 2006-08-14 | 주식회사 엘지화학 | Retroreflective sheet having the good maintenance of it's shape in irregular surface and Method for manufacturing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62258422A (en) * | 1986-05-02 | 1987-11-10 | Seiko Epson Corp | Liquid crystal display element |
-
1987
- 1987-12-14 JP JP62315735A patent/JPH01155317A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62258422A (en) * | 1986-05-02 | 1987-11-10 | Seiko Epson Corp | Liquid crystal display element |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH049514U (en) * | 1990-05-15 | 1992-01-28 | ||
| JP2002052647A (en) * | 2000-08-11 | 2002-02-19 | Tokyo Seitankosho:Kk | Molded object made of light alloy |
| KR100612979B1 (en) * | 2004-08-17 | 2006-08-14 | 주식회사 엘지화학 | Retroreflective sheet having the good maintenance of it's shape in irregular surface and Method for manufacturing the same |
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