JPH06289221A - Production of elliptically polarizing plate - Google Patents
Production of elliptically polarizing plateInfo
- Publication number
- JPH06289221A JPH06289221A JP7472993A JP7472993A JPH06289221A JP H06289221 A JPH06289221 A JP H06289221A JP 7472993 A JP7472993 A JP 7472993A JP 7472993 A JP7472993 A JP 7472993A JP H06289221 A JPH06289221 A JP H06289221A
- Authority
- JP
- Japan
- Prior art keywords
- polarizing plate
- plate
- elliptically polarizing
- cut
- retardation
- 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
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- Polarising Elements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液晶表示パネルに使用
される楕円偏光板の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an elliptically polarizing plate used in a liquid crystal display panel.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】液晶表
示パネルの基本構成は、図１に図示したように液晶セル
21の両側に直線偏光板22が配設された構成で、このうち
液晶セル21は、透明の電極層23を形成した２枚の基板24
をスペーサー25を介して対向配設し、両基板24間に液晶
26を封入すると共に周囲を完全にシールした構成となっ
ている(符号27は感圧性粘着剤である。)。2. Description of the Related Art The basic structure of a liquid crystal display panel is as shown in FIG.
The linear polarizing plates 22 are arranged on both sides of the liquid crystal cell 21, and the liquid crystal cell 21 includes two substrates 24 on which a transparent electrode layer 23 is formed.
Are arranged opposite to each other via a spacer 25, and the liquid crystal is provided between both substrates 24.
It has a structure in which 26 is enclosed and the periphery is completely sealed (reference numeral 27 is a pressure-sensitive adhesive).
【０００３】基板24は光学的に透明でかつ光等方性であ
ることが要求され、従来は専らガラス板が使用されてい
たが、最近ではマルチメディア等に代表される用途とし
て、エンジニアリングプラスチックフィルム製基板も使
用されはじめている。The substrate 24 is required to be optically transparent and optically isotropic, and a glass plate has been used exclusively in the past, but recently, an engineering plastic film has been used as a typical application such as multimedia. Substrates made of metal are also being used.
【０００４】液晶表示パネルは、ＯＡ機器等のディスプ
レイ装置として大量に使用されており、特に、大型の液
晶表示パネルにはＳＴＮ(スーパーツイステッド,ネマチ
ック)方式の液晶表示パネルが多用されているが、最近
では中,小型サイズの表示パネルにもＳＴＮ方式の液晶
表示パネルが多用されている。Liquid crystal display panels are used in large quantities as display devices for office automation equipment and the like, and in particular, STN (Super Twisted, Nematic) type liquid crystal display panels are often used for large liquid crystal display panels. Recently, STN type liquid crystal display panels are often used for medium and small size display panels.
【０００５】ＳＴＮ液晶表示パネルは複屈折性を利用す
る為、液晶セルを通過した光は楕円偏光となり、目に見
える表示色が青色系統や緑色ないし黄色系統に着色して
しまう。その為楕円偏光を直線偏光に戻すことで着色を
防止すべく、位相差板(複屈性を有する部材)を介在させ
る方式が提案されている(直線偏光板と位相差板を貼合
したもの、即ち楕円偏光板)。この方式はＦＴＮ方式な
どとも言われており、該ＦＴＮ方式により単層液晶セル
による白黒ディスプレイを可能にした。Since the STN liquid crystal display panel utilizes birefringence, the light passing through the liquid crystal cell becomes elliptically polarized light, and the visible display color is colored in a blue system or a green or yellow system. Therefore, in order to prevent coloring by returning elliptically polarized light to linearly polarized light, a method of interposing a retardation plate (a member having birefringence) has been proposed (a linear polarizing plate and a retardation plate are bonded together. , That is, an elliptically polarizing plate). This system is also called an FTN system, and the FTN system enables a monochrome display by a single-layer liquid crystal cell.
【０００６】このような従来の楕円偏光板を製造は、別
個に粘着加工された直線偏光板、位相差板を用い、夫々
をスーパーカッター,トムソン打ち抜き機等を用いて所
定のサイズ、光軸関係が保てるようにチップカットを行
い、貼合機を用いて両者を貼合して製造している。The conventional elliptically polarizing plate is manufactured by using a linearly polarizing plate and a retardation plate which are separately processed with an adhesive, and using a super cutter, a Thomson punching machine, etc., each having a predetermined size and an optical axis relationship. It is manufactured by cutting the chip so that it can be maintained and using a bonding machine to bond both.
【０００７】しかしながら、ＳＴＮ液晶表示パネルの用
途の拡大、また、ＳＴＮ液晶表示を白黒化する楕円偏光
板のサイズ,偏光板光軸と位相差板光軸との関係光軸の
多様化により、上記のような粘着加工された直線偏光
板、位相差板を別個にチップ状にカットし、貼合してい
たのでは、歩留りの点、コストの点等から望ましくな
く、材料を有効に使用できないという問題が生じてい
る。However, due to the expansion of applications of the STN liquid crystal display panel, the size of the elliptical polarizing plate for making the STN liquid crystal display black and white, and the diversification of the optical axes of the polarizing plate optical axis and the retardation plate optical axis, It is not desirable from the viewpoint of yield, cost, etc. that the linearly polarizing plate and the retardation plate, which have been adhesively processed, are separately cut into chips and are bonded, and the material cannot be effectively used. There is a problem.
【０００８】本発明は、このような欠点を解決した楕円
偏光板の製造方法を提供することを技術的課題とするも
のである。An object of the present invention is to provide a method for manufacturing an elliptically polarizing plate which solves the above drawbacks.
【０００９】[0009]
【課題を解決するための手段】添付図面を参照して本発
明の要旨を説明する。The gist of the present invention will be described with reference to the accompanying drawings.
【００１０】直線偏光板１と位相差板２とを夫々ロール
フィルム形状に形成し、両者をその関係光軸を考慮して
貼合せしめた後、所定形状に切断することを特徴とする
楕円偏光板の製造方法に係るものである。The elliptically polarized light is characterized in that the linearly polarizing plate 1 and the retardation plate 2 are each formed in the shape of a roll film, the two are bonded together in consideration of their optical axes of relation, and then cut into a predetermined shape. The present invention relates to a method for manufacturing a plate.
【００１１】[0011]
【作用】直線偏光板１と位相差板２とをロールフィルム
形状に形成し、両者をその関係光軸を考慮して貼合した
後、所定形状にカットする方法即ち、別個に形成し且つ
粘着加工した直線偏光板１と位相差板２とをその都度関
係光軸を考慮して貼合するのではなく、予め関係光軸を
考慮して貼合したものを所定形状にカットする方法であ
る為、量産性に秀れると共に、光学的特性が劣下するこ
とはない。The method of forming the linearly polarizing plate 1 and the retardation film 2 in the form of a roll film, laminating the two in consideration of their relational optical axes, and then cutting them into a predetermined shape, that is, forming and adhering separately This is a method in which the processed linearly polarizing plate 1 and the retardation plate 2 are not bonded to each other in consideration of the related optical axis in each case, but are cut in a predetermined shape after being bonded in consideration of the related optical axis in advance. Therefore, the mass productivity is excellent and the optical characteristics are not deteriorated.
【００１２】[0012]
【実施例】直線偏光板１と位相差板２とを貼合加工する
塗工機を用い、次に示した工程により、大型楕円偏光板
を製造する。EXAMPLE A large elliptically polarizing plate is manufactured by using the coating machine for laminating the linear polarizing plate 1 and the retardation plate 2 by the following steps.
【００１３】 両面に保護フィルムが貼合された直線
偏光板１を、貼合する位相差板２との関係光軸(図２に
おいて矢印方向は光吸収軸)を考慮し、図２に図示した
ようにバイアスカットし(図２においてＬ線はカット
線)、続いて、図３に図示したようにカットした直線偏
光板１を適宜な手段(例えば粘着テープ５等)で継合して
ロールフィルム状とし(図３において矢印方向は光吸収
軸)、該直線偏光板１の片面の保護フィルムを剥離し、
この面に粘着加工を施し(離型フィルムが付された連続
バイアス粘着直線偏光板１とし、)、専用ドラムに巻き
とる。A linear polarizing plate 1 having protective films attached on both sides is illustrated in FIG. 2 in consideration of an optical axis (a light absorption axis in a direction of an arrow in FIG. 2) with a retardation plate 2 to be attached. Bias cut as shown in FIG. 2 (L line is a cut line), and then the linear polarizing plate 1 cut as shown in FIG. 3 is spliced by an appropriate means (such as an adhesive tape 5) to form a roll film. (The direction of the arrow in FIG. 3 is the light absorption axis) and the protective film on one side of the linear polarizing plate 1 is peeled off,
Adhesive processing is applied to this surface (the continuous bias adhesive linearly polarizing plate 1 having a release film attached thereto) is wound on a dedicated drum.
【００１４】 前記の離型フィルムを剥離し、該連
続バイアス粘着直線偏光板１とロールフィルム状の一軸
延伸位相差板２とを連続的に貼合して専用ドラムに巻き
とり、専用ドラムに巻回された非粘着楕円偏光板を得
る。The release film is peeled off, and the continuous bias adhesive linearly polarizing plate 1 and the roll film-shaped uniaxially stretched retardation plate 2 are continuously bonded and wound on a dedicated drum and wound on a dedicated drum. Obtain a rotated non-adhesive elliptically polarizing plate.
【００１５】 この非粘着楕円偏光板に(一軸延伸位
相差板２側に)、連続的に粘着加工を施し(離型フィルム
を付し、)、シート状のバイアス粘着楕円偏光板を得
る。この大型サイズバイアス粘着楕円偏光板を、スーパ
ーカッター、トムソン打ち抜き機等を用いて小型,中型,
大型,適宜なサイズの液晶表示パネルに対応するチップ
状の楕円偏光板とする。This non-adhesive elliptically polarizing plate (on the side of the uniaxially stretched retardation plate 2) is continuously subjected to adhesive processing (with a release film) to obtain a sheet-shaped bias adhesive elliptically polarizing plate. This large size bias adhesive elliptically polarizing plate can be used for small, medium and
A chip-shaped elliptically polarizing plate corresponding to a large-sized, appropriately sized liquid crystal display panel.
【００１６】 使用に際しては前記のチップ状の楕
円偏光板の離型フィルムを剥離し、図４に図示したよう
な液晶セル３の両側(若しくは片側)に該楕円偏光板を貼
合する(符号４は感圧粘着剤である。また、液晶セル３
は図１と同様な構成である。)。もちろん、該楕円偏光
板に付されている保護フィルムも剥離する。In use, the release film of the chip-shaped elliptically polarizing plate is peeled off, and the elliptically polarizing plate is attached to both sides (or one side) of the liquid crystal cell 3 as shown in FIG. 4 (reference numeral 4). Is a pressure sensitive adhesive, and the liquid crystal cell 3
Has the same configuration as in FIG. ). Of course, the protective film attached to the elliptically polarizing plate is also peeled off.
【００１７】上記した手段により、種々の液晶表示パネ
ルに使用される小型,中型,大型のチップ状楕円偏光板が
効率良く、しかも安価に製造し得る事になる。By the means described above, small, medium and large chip-shaped elliptically polarizing plates used for various liquid crystal display panels can be efficiently manufactured at low cost.
【００１８】位相差板２の種類としては、ポリビニルア
ルコール系樹脂等が一般的であるが、これ以外の一軸延
伸フィルムであっても良く、全ての一軸延伸位相差板２
の使用が可能である。As the type of the retardation plate 2, a polyvinyl alcohol-based resin or the like is generally used, but other uniaxially stretched films may be used, and all uniaxially stretched retardation plates 2 may be used.
Can be used.
【００１９】位相差板２がもっている重要な物性値とし
てレターデーション(Ｒe)があるが、この物性値はＲe＝
△n.d(△n:複屈折,d:フィルム厚さ)で定義される物理量
である。Retardation (Re) is an important physical property value of the retardation plate 2. This physical property value is Re =
It is a physical quantity defined by Δnd (Δn: birefringence, d: film thickness).
【００２０】ロールフィルム状の位相差板２を直線偏光
板１と貼合する場合に、専用ドラムよりロールフィルム
状位相差板２が引き出されるが、フィルムの材質により
決まる光弾性定数により、貼合前のロールフィルム状の
位相差板２のレターデーションの変化を先に見こし、使
用するロールフィルム状の位相差板２のレターデーショ
ン値をあらかじめ低い側に設定しておくことにより、所
望のレターデーション値をもつ大型楕円偏光板も定常的
に製造することが可能である。When the roll film-shaped retardation plate 2 is bonded to the linear polarizing plate 1, the roll film-shaped retardation plate 2 is pulled out from a dedicated drum, but it is bonded by the photoelastic constant determined by the material of the film. By finding the change in retardation of the roll film-shaped retardation plate 2 before and setting the retardation value of the roll film-shaped retardation plate 2 to be used in advance to a lower value, the desired retardation can be obtained. It is possible to constantly manufacture a large elliptically polarizing plate having a retardation value.
【００２１】以下、具体的な実施例を示す。Specific examples will be described below.
【００２２】〈実施例１〉 単位平均透過率44％の500m
m幅直線偏光板とレターデーション値が580nm,340mm幅の
ロールフィルム状のポリカーポネート製一軸延伸位相差
板２を用い、前記の工程を経て、480×550mm(位相差板
２の光軸＼40°:貼着面下)の大型楕円偏光板のレターデ
ーション値のバラツキ分布は下記の如くであった(図５
参照,図５中xは直線偏光板１の光吸収軸,yは１軸延伸位
相差板２の光軸)。Example 1 500 m with a unit average transmittance of 44%
Using an m-width linear polarizing plate and a roll film-shaped uniaxially stretched retardation plate 2 made of polycarbonate with a retardation value of 580 nm and 340 mm width, through the above steps, 480 × 550 mm (optical axis of retardation plate 2 The variation distribution of the retardation value of the large elliptically polarizing plate (40 °: below the sticking surface) was as follows (Fig. 5).
(See, x in FIG. 5 is the optical absorption axis of the linear polarizing plate 1, and y is the optical axis of the uniaxially stretched retardation plate 2.)
【００２３】[0023]
【表１】 [Table 1]
【００２４】※1 レンジとは、(Ｍax−Ｍin)の値をい
う。* 1 Range means the value of (Max-Min).
【００２５】※2 n数とは大型楕円偏光板１枚若しくは
一軸延伸位相差板２の面内をn個に分割し、Ｒe値を測定
したことを意味する。従って、上記表の上段は、貼合前
は100個に分割した一軸延伸位相差板２のＲe値,下段は1
60個に分割した大型楕円偏光板のＲe値を示しているこ
とになる。* 2 The number of n means that one large elliptically polarizing plate or the in-plane of the uniaxially stretched retardation plate 2 is divided into n and the Re value is measured. Therefore, the upper row of the above table is the Re value of the uniaxially stretched retardation plate 2 divided into 100 pieces before bonding, and the lower row is 1
This shows the Re value of the large elliptically polarizing plate divided into 60 pieces.
【００２６】〈実施例２〉 実施例(１)と同じ直線偏光
板１を用い、レターデーション値が406nm,630mm幅のロ
ールフィルム状のポリビニルアルコール製１軸延伸位相
差板２を用いたレターデーション値のバラツキ分布は下
記の如くであった(その余は、実施例(１)と同様。)。Example 2 Using the same linear polarizing plate 1 as in Example (1), a retardation value was obtained by using a uniaxially stretched retardation plate 2 made of polyvinyl alcohol in the form of a roll film having a retardation value of 406 nm and a width of 630 mm. The distribution of variation in value was as follows (the rest was the same as in Example (1)).
【００２７】[0027]
【表２】 [Table 2]
【００２８】[0028]
【発明の効果】本発明による楕円偏光板の製造方法によ
り、光学物性値が均一にして、量産性に秀れ、画期的な
楕円偏光板の製造が可能となり、液晶表示装置の小型,
中型,大型への対応が歩留り良くでき、特に小型,中型
(時計サイズ,オモチャサイズ)サイズの楕円偏光板の安
定供給が可能となる。EFFECTS OF THE INVENTION The method for producing an elliptically polarizing plate according to the present invention makes it possible to produce an epoch-making elliptically polarizing plate with uniform optical properties, excellent mass productivity, and compact liquid crystal display device.
Good yield for medium and large size, especially small and medium size
It enables stable supply of (clock size, toy size) elliptically polarizing plates.
【図１】液晶表示パネルの説明断面図である。FIG. 1 is an explanatory cross-sectional view of a liquid crystal display panel.
【図２】本実施例の工程説明である。FIG. 2 is a process description of the present embodiment.
【図３】本実施例の工程説明である。FIG. 3 is a process description of the present embodiment.
【図４】本実施例により製造した製品の使用状態を示す
説明断面図である。FIG. 4 is an explanatory cross-sectional view showing a usage state of a product manufactured according to this example.
【図５】本実施例に係る楕円偏光板の貼着面下の説明図
である。FIG. 5 is an explanatory diagram below a pasting surface of the elliptically polarizing plate according to the present embodiment.
１ 直線偏光板 ２ 位相差板 1 Linear polarization plate 2 Phase difference plate
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成５年６月１７日[Submission date] June 17, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Correction target item name] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【書類名】 明細書[Document name] Statement
【発明の名称】 楕円偏光板の製造方法Title of the invention: Method for manufacturing elliptically polarizing plate
【特許請求の範囲】[Claims]
【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、液晶表示パネルに使用
される楕円偏光板の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an elliptically polarizing plate used in a liquid crystal display panel.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】液晶表
示パネルの基本構成は、図１に図示したように液晶セル
21の両側に直線偏光板22が配置された構成で、このうち
液晶セル21は、透明の電極層23を形成した２枚の基板24
をスペーサー25を介して対向配置し、両基板24間に液晶
26を封入すると共に周囲を完全にシールした構成となっ
ている(符号27は感圧性粘着剤である。)。2. Description of the Related Art The basic structure of a liquid crystal display panel is as shown in FIG.
The linear polarizing plates 22 are arranged on both sides of the liquid crystal cell 21, and the liquid crystal cell 21 includes two substrates 24 having a transparent electrode layer 23 formed thereon.
Are placed opposite to each other via a spacer 25, and the liquid crystal is placed between both substrates 24.
It has a structure in which 26 is enclosed and the periphery is completely sealed (reference numeral 27 is a pressure-sensitive adhesive).
【０００３】基板24は光学的に透明でかつ光等方性であ
ることが要求され、従来は専らガラス板が使用されてい
たが、最近ではマルチメディア等に代表される用途とし
て、エンジニアリングプラスチックフィルム製基板も使
用されはじめている。The substrate 24 is required to be optically transparent and optically isotropic, and a glass plate has been used exclusively in the past, but recently, an engineering plastic film has been used as a typical application such as multimedia. Substrates made of metal are also being used.
【０００４】液晶表示パネルは、ＯＡ機器等のディスプ
レイ装置として大量に使用されており、特に、大型の液
晶表示パネルにはＳＴＮ(スーパーツイステッド,ネマチ
ック)方式の液晶表示パネルが多用されているが、最近
では中,小型サイズの表示パネルにもＳＴＮ方式の液晶
表示パネルが多用されている。Liquid crystal display panels are used in large quantities as display devices for office automation equipment and the like, and in particular, STN (Super Twisted, Nematic) type liquid crystal display panels are often used for large liquid crystal display panels. Recently, STN type liquid crystal display panels are often used for medium and small size display panels.
【０００５】ＳＴＮ液晶表示パネルは複屈折性を利用す
る為、液晶セルを通過した光は楕円偏光となり、目に見
える表示色が青色系統や緑色ないし黄色系統に着色して
しまう。その為楕円偏光を直線偏光に戻すことで着色を
防止すべく、位相差板(複屈性を有する部材)を介在させ
る方式が提案されている(直線偏光板と位相差板を貼合
したもの、即ち楕円偏光板)。この方式はＦＴＮ方式な
どとも言われており、該ＦＴＮ方式により単層液晶セル
による白黒ディスプレイを可能にした。Since the STN liquid crystal display panel utilizes birefringence, the light passing through the liquid crystal cell becomes elliptically polarized light, and the visible display color is colored in a blue system or a green or yellow system. Therefore, in order to prevent coloring by returning elliptically polarized light to linearly polarized light, a method of interposing a retardation plate (a member having birefringence) has been proposed (a linear polarizing plate and a retardation plate are bonded together. , That is, an elliptically polarizing plate). This system is also called an FTN system, and the FTN system enables a monochrome display by a single-layer liquid crystal cell.
【０００６】このような従来の楕円偏光板の製造は、別
個に粘着加工された直線偏光板、位相差板を用い、夫々
をスーパーカッター,トムソン打ち抜き機等を用いて所
定のサイズ、光軸関係が保てるようにチップカットを行
い、貼合機を用いて両者を貼合して製造している。The conventional elliptically polarizing plate is manufactured by using a linearly polarizing plate and a retardation plate which are separately adhered to each other, and using a super cutter, a Thomson punching machine, etc., each having a predetermined size and an optical axis relationship. It is manufactured by cutting the chip so that it can be maintained and using a bonding machine to bond both.
【０００７】しかしながら、ＳＴＮ液晶表示パネルの用
途の拡大、また、ＳＴＮ液晶表示を白黒化する楕円偏光
板のサイズ,偏光板光軸と位相差板光軸との関係、光軸
の多様化により、上記のような粘着加工された直線偏光
板、位相差板を別個にチップ状にカットし、貼合してい
たのでは、歩留りの点、コストの点等から望ましくな
く、材料を有効に使用できないという問題が生じてい
る。However, due to the expansion of applications of STN liquid crystal display panels, the size of the elliptical polarizing plate for making STN liquid crystal display black and white, the relationship between the polarizing plate optical axis and the retardation plate optical axis, and the diversification of the optical axis, If the adhesive-processed linearly polarizing plate and retardation plate were separately cut into chips and bonded, it is not desirable from the viewpoint of yield, cost, etc., and the material cannot be used effectively. The problem has arisen.
【０００８】本発明は、このような欠点を解決した楕円
偏光板の製造方法を提供することを技術的課題とするも
のである。An object of the present invention is to provide a method for manufacturing an elliptically polarizing plate which solves the above drawbacks.
【０００９】[0009]
【課題を解決するための手段】添付図面を参照して本発
明の要旨を説明する。The gist of the present invention will be described with reference to the accompanying drawings.
【００１０】直線偏光板１と位相差板２とを夫々ロール
フィルム形状に形成し、両者をその関係光軸を考慮して
貼合せしめた後、所定形状に切断することを特徴とする
楕円偏光板の製造方法に係るものである。The elliptically polarized light is characterized in that the linearly polarizing plate 1 and the retardation plate 2 are each formed in the shape of a roll film, the two are bonded together in consideration of their optical axes of relation, and then cut into a predetermined shape. The present invention relates to a method for manufacturing a plate.
【００１１】[0011]
【作用】直線偏光板１と位相差板２とをロールフィルム
形状に形成し、両者をその関係光軸を考慮して貼合した
後、所定形状にカットする方法即ち、別個に形成し且つ
粘着加工した直線偏光板１と位相差板２とをその都度関
係光軸を考慮して貼合するのではなく、予め関係光軸を
考慮して貼合したものを所定形状にカットする方法であ
る為、量産性に秀れると共に、光学的特性が劣下するこ
とはない。The method of forming the linearly polarizing plate 1 and the retardation film 2 in the form of a roll film, laminating the two in consideration of their relational optical axes, and then cutting them into a predetermined shape, that is, forming and adhering separately This is a method in which the processed linearly polarizing plate 1 and the retardation plate 2 are not bonded to each other in consideration of the related optical axis in each case, but are cut in a predetermined shape after being bonded in consideration of the related optical axis in advance. Therefore, the mass productivity is excellent and the optical characteristics are not deteriorated.
【００１２】[0012]
【実施例】直線偏光板１と位相差板２とを貼合加工する
塗工機を用い、次に示した工程により、大型楕円偏光板
を製造する。EXAMPLE A large elliptically polarizing plate is manufactured by using the coating machine for laminating the linear polarizing plate 1 and the retardation plate 2 by the following steps.
【００１３】 両面に保護フィルムが貼合された直線
偏光板１を、貼合する位相差板２との関係光軸(図２に
おいて矢印方向は光吸収軸)を考慮し、図２に図示した
ようにバイアスカットし(図２においてＬ線はカット
線)、続いて、図３に図示したようにカットした直線偏
光板１を適宜な手段(例えば粘着テープ５等)で継合して
ロールフィルム状とし(図３において矢印方向は光吸収
軸)、該直線偏光板１の片面の保護フィルムを剥離し、
この面に粘着加工を施し(離型フィルムが付された連続
バイアス粘着直線偏光板１とし、)、専用ドラムに巻き
とる。A linear polarizing plate 1 having protective films attached on both sides is illustrated in FIG. 2 in consideration of an optical axis (a light absorption axis in a direction of an arrow in FIG. 2) with a retardation plate 2 to be attached. Bias cut as shown in FIG. 2 (L line is a cut line), and then the linear polarizing plate 1 cut as shown in FIG. 3 is spliced by an appropriate means (such as an adhesive tape 5) to form a roll film. (The direction of the arrow in FIG. 3 is the light absorption axis) and the protective film on one side of the linear polarizing plate 1 is peeled off,
Adhesive processing is applied to this surface (the continuous bias adhesive linearly polarizing plate 1 having a release film attached thereto) is wound on a dedicated drum.
【００１４】 前記の離型フィルムを剥離し、該連
続バイアス粘着直線偏光板１とロールフィルム状の一軸
延伸位相差板２とを連続的に貼合して専用ドラムに巻き
とり、専用ドラムに巻かれた非粘着楕円偏光板を得る。The release film is peeled off, and the continuous bias adhesive linearly polarizing plate 1 and the roll film-shaped uniaxially stretched retardation plate 2 are continuously bonded and wound on a dedicated drum and wound on a dedicated drum. A non-adhesive elliptical polarizing plate is obtained.
【００１５】 この非粘着楕円偏光板に(一軸延伸位
相差板２側に)、連続的に粘着加工を施し(離型フィルム
を付し、)、シート状のバイアス粘着楕円偏光板を得
る。この大型サイズバイアス粘着楕円偏光板を、スーパ
ーカッター、トムソン打ち抜き機等を用いて小型,中型,
大型,適宜なサイズの液晶表示パネルに対応するチップ
状の楕円偏光板とする。This non-adhesive elliptically polarizing plate (on the side of the uniaxially stretched retardation plate 2) is continuously subjected to adhesive processing (with a release film) to obtain a sheet-shaped bias adhesive elliptically polarizing plate. This large size bias adhesive elliptically polarizing plate can be used for small, medium and
A chip-shaped elliptically polarizing plate corresponding to a large-sized, appropriately sized liquid crystal display panel.
【００１６】 使用に際しては前記のチップ状の楕
円偏光板の離型フィルムを剥離し、図４に図示したよう
な液晶セル３の両側(若しくは片側)に該楕円偏光板を貼
合する(符号４は感圧粘着剤である。また、液晶セル３
は図１と同様な構成である。)。もちろん、該楕円偏光
板に付されている保護フィルムも剥離する。In use, the release film of the chip-shaped elliptically polarizing plate is peeled off, and the elliptically polarizing plate is attached to both sides (or one side) of the liquid crystal cell 3 as shown in FIG. 4 (reference numeral 4). Is a pressure sensitive adhesive, and the liquid crystal cell 3
Has the same configuration as in FIG. ). Of course, the protective film attached to the elliptically polarizing plate is also peeled off.
【００１７】上記した手段により、種々の液晶表示パネ
ルに使用される小型,中型,大型のチップ状楕円偏光板が
効率良く、しかも安価に製造し得る事になる。By the means described above, small, medium and large chip-shaped elliptically polarizing plates used for various liquid crystal display panels can be efficiently manufactured at low cost.
【００１８】位相差板２の種類としては、ポリビニルア
ルコール系樹脂等が一般的であるが、これ以外の一軸延
伸フィルムであっても良く、全ての一軸延伸位相差板２
の使用が可能である。As the type of the retardation plate 2, a polyvinyl alcohol-based resin or the like is generally used, but other uniaxially stretched films may be used, and all uniaxially stretched retardation plates 2 may be used.
Can be used.
【００１９】位相差板２がもっている重要な物性値とし
てレターデーション(Ｒe)があるが、この物性値はＲe＝
△n.d(△n:複屈折,d:フィルム厚さ)で定義される物理量
である。Retardation (Re) is an important physical property value of the retardation plate 2. This physical property value is Re =
It is a physical quantity defined by Δnd (Δn: birefringence, d: film thickness).
【００２０】ロールフィルム状の位相差板２を直線偏光
板１と貼合する場合に、専用ドラムよりロールフィルム
状位相差板２が引き出されるが、フィルムの材質により
決まる光弾性定数により、貼合前のロールフィルム状の
位相差板２のレターデーションの変化を先に見こし、使
用するロールフィルム状の位相差板２のレターデーショ
ン値をあらかじめ低い側に設定しておくことにより、所
望のレターデーション値をもつ大型楕円偏光板も定常的
に製造することが可能である。When the roll film-shaped retardation plate 2 is bonded to the linear polarizing plate 1, the roll film-shaped retardation plate 2 is pulled out from a dedicated drum, but it is bonded by the photoelastic constant determined by the material of the film. By finding the change in retardation of the roll film-shaped retardation plate 2 before and setting the retardation value of the roll film-shaped retardation plate 2 to be used in advance to a lower value, the desired retardation can be obtained. It is possible to constantly manufacture a large elliptically polarizing plate having a retardation value.
【００２１】以下、具体的な実施例を示す。Specific examples will be described below.
【００２２】〈実施例１〉 単体平均透過率44％の500m
m幅直線偏光板とレターデーション値が580nm,340mm幅の
ロールフィルム状のポリカーボネート製一軸延伸位相差
板２を用い、前記の工程を経て、480×550mm(位相差板
２の光軸＼40°:貼着面下)の大型楕円偏光板のレターデ
ーション値のバラツキ分布は下記の如くであった(図５
参照,図５中xは直線偏光板１の光吸収軸,yは１軸延伸位
相差板２の光軸)。<Embodiment 1> 500 m with a single average transmittance of 44%
Using an m-width linearly polarizing plate and a roll film-shaped uniaxially stretched retardation plate 2 in the form of a roll film having a retardation value of 580 nm and 340 mm, 480 × 550 mm (optical axis of retardation plate 2 \ 40 ° The distribution of variation in retardation value of the large-sized elliptically polarizing plate (below the bonding surface) was as follows (Fig. 5).
(See, x in FIG. 5 is the optical absorption axis of the linear polarizing plate 1, and y is the optical axis of the uniaxially stretched retardation plate 2.)
【００２３】[0023]
【表１】 [Table 1]
【００２４】※1 レンジとは、(Ｍax−Ｍin)の値をい
う。* 1 Range means the value of (Max-Min).
【００２５】※2 n数とは大型楕円偏光板１枚若しくは
一軸延伸位相差板２の面内をn個に分割し、Ｒe値を測定
したことを意味する。従って、上記表の上段は、貼合前
は100個に分割した一軸延伸位相差板２のＲe値,下段は1
60個に分割した大型楕円偏光板のＲe値を示しているこ
とになる。* 2 The number of n means that one large elliptically polarizing plate or the in-plane of the uniaxially stretched retardation plate 2 is divided into n and the Re value is measured. Therefore, the upper row of the above table is the Re value of the uniaxially stretched retardation plate 2 divided into 100 pieces before bonding, and the lower row is 1
This shows the Re value of the large elliptically polarizing plate divided into 60 pieces.
【００２６】〈実施例２〉 実施例(１)と同じ直線偏光
板１を用い、レターデーション値が406nm,630mm幅のロ
ールフィルム状のポリビニルアルコール製１軸延伸位相
差板２を用いたレターデーション値のバラツキ分布は下
記の如くであった(その他は、実施例(１)と同様。)。Example 2 Using the same linear polarizing plate 1 as in Example (1), a retardation value was obtained by using a uniaxially stretched retardation plate 2 made of polyvinyl alcohol in the form of a roll film having a retardation value of 406 nm and a width of 630 mm. The distribution of variation in values was as follows (others were the same as in Example (1)).
【００２７】[0027]
【表２】 [Table 2]
【００２８】[0028]
【発明の効果】本発明による楕円偏光板の製造方法によ
り、光学物性値が均一にして、量産性に秀れ、画期的な
楕円偏光板の製造が可能となり、液晶表示装置の小型,
中型,大型への対応が歩留り良くでき、特に小型,中型
(時計サイズ,オモチャサイズ)サイズの楕円偏光板の安
定供給が可能となる。EFFECTS OF THE INVENTION The method for producing an elliptically polarizing plate according to the present invention makes it possible to produce an epoch-making elliptically polarizing plate with uniform optical properties, excellent mass productivity, and compact liquid crystal display device.
Good yield for medium and large size, especially small and medium size
It enables stable supply of (clock size, toy size) elliptically polarizing plates.
【図面の簡単な説明】[Brief description of drawings]
【図１】液晶表示パネルの説明断面図である。FIG. 1 is an explanatory cross-sectional view of a liquid crystal display panel.
【図２】本実施例の工程説明である。FIG. 2 is a process description of the present embodiment.
【図３】本実施例の工程説明である。FIG. 3 is a process description of the present embodiment.
【図４】本実施例により製造した製品の使用状態を示す
説明断面図である。FIG. 4 is an explanatory cross-sectional view showing a usage state of a product manufactured according to this example.
【図５】本実施例に係る楕円偏光板の貼着面下の説明図
である。FIG. 5 is an explanatory diagram below a pasting surface of the elliptically polarizing plate according to the present embodiment.
【符号の説明】 １ 直線偏光板 ２ 位相差板[Explanation of reference numerals] 1 linear polarizing plate 2 retardation plate
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図１[Name of item to be corrected] Figure 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
Claims (1)
ィルム形状に形成し、両者をその関係光軸を考慮して貼
合せしめた後、所定形状に切断することを特徴とする楕
円偏光板の製造方法。1. An elliptically polarized light characterized in that a linearly polarizing plate and a retardation film are formed in a roll film shape, respectively, and the two are bonded together in consideration of their relational optical axes and then cut into a predetermined shape. Method of manufacturing a plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7472993A JPH06289221A (en) | 1993-03-31 | 1993-03-31 | Production of elliptically polarizing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7472993A JPH06289221A (en) | 1993-03-31 | 1993-03-31 | Production of elliptically polarizing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06289221A true JPH06289221A (en) | 1994-10-18 |
Family
ID=13555609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7472993A Pending JPH06289221A (en) | 1993-03-31 | 1993-03-31 | Production of elliptically polarizing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06289221A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08201625A (en) * | 1995-01-30 | 1996-08-09 | Arisawa Mfg Co Ltd | Production of laminated polarizing plate |
| JPH08201623A (en) * | 1995-01-30 | 1996-08-09 | Arisawa Mfg Co Ltd | Production of laminated polarizing plate |
| JPH08201624A (en) * | 1995-01-30 | 1996-08-09 | Arisawa Mfg Co Ltd | Production of laminated polarizing plate |
| WO2000011516A1 (en) * | 1998-08-25 | 2000-03-02 | Citizen Watch Co., Ltd. | Liquid crystal display and method for manufacturing the same |
| JP2002022944A (en) * | 2000-07-06 | 2002-01-23 | Fuji Photo Film Co Ltd | Circularly polarizing plate and its manufacturing method |
| KR100481750B1 (en) * | 1997-04-16 | 2005-09-02 | 스미또모 가가꾸 가부시키가이샤 | Manufacturing Method of Optical Film Chip and Optical Film Chip Intermediates |
| JP2006003640A (en) * | 2004-06-17 | 2006-01-05 | Fuji Photo Film Co Ltd | Liquid crystal display device |
| KR100912860B1 (en) * | 1998-10-12 | 2009-08-19 | 스미또모 가가꾸 가부시키가이샤 | Optical film laminates and process for preparing the same |
| JP2010078843A (en) * | 2008-09-25 | 2010-04-08 | Nitto Denko Corp | Optical film winding original roll, and method of manufacturing the same |
| CN103403586A (en) * | 2011-11-11 | 2013-11-20 | 住友化学株式会社 | Optical film chip cutting device and method for cutting optical film chip |
| JP2016513272A (en) * | 2013-02-06 | 2016-05-12 | ドングウー ファイン−ケム カンパニー、 リミテッドＤｏｎｇｗｏｏ Ｆｉｎｅ−Ｃｈｅｍ Ｃｏ．， Ｌｔｄ． | Polarizing plate and liquid crystal display device including the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53131853A (en) * | 1977-04-22 | 1978-11-17 | Casio Comput Co Ltd | Elliptically polarizing plate |
| JPS5559407A (en) * | 1978-10-25 | 1980-05-02 | Fuji Photo Film Co Ltd | Production of polarization phase difference plate |
| JPH04123008A (en) * | 1990-09-14 | 1992-04-23 | Nitto Denko Corp | Production of elliptically polarizing plate |
-
1993
- 1993-03-31 JP JP7472993A patent/JPH06289221A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53131853A (en) * | 1977-04-22 | 1978-11-17 | Casio Comput Co Ltd | Elliptically polarizing plate |
| JPS5559407A (en) * | 1978-10-25 | 1980-05-02 | Fuji Photo Film Co Ltd | Production of polarization phase difference plate |
| JPH04123008A (en) * | 1990-09-14 | 1992-04-23 | Nitto Denko Corp | Production of elliptically polarizing plate |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08201623A (en) * | 1995-01-30 | 1996-08-09 | Arisawa Mfg Co Ltd | Production of laminated polarizing plate |
| JPH08201624A (en) * | 1995-01-30 | 1996-08-09 | Arisawa Mfg Co Ltd | Production of laminated polarizing plate |
| JPH08201625A (en) * | 1995-01-30 | 1996-08-09 | Arisawa Mfg Co Ltd | Production of laminated polarizing plate |
| KR100481750B1 (en) * | 1997-04-16 | 2005-09-02 | 스미또모 가가꾸 가부시키가이샤 | Manufacturing Method of Optical Film Chip and Optical Film Chip Intermediates |
| WO2000011516A1 (en) * | 1998-08-25 | 2000-03-02 | Citizen Watch Co., Ltd. | Liquid crystal display and method for manufacturing the same |
| US6853437B1 (en) | 1998-08-25 | 2005-02-08 | Citizen Watch Co., Ltd. | Liquid crystal display and method for manufacturing the same |
| KR100912860B1 (en) * | 1998-10-12 | 2009-08-19 | 스미또모 가가꾸 가부시키가이샤 | Optical film laminates and process for preparing the same |
| JP2002022944A (en) * | 2000-07-06 | 2002-01-23 | Fuji Photo Film Co Ltd | Circularly polarizing plate and its manufacturing method |
| JP2006003640A (en) * | 2004-06-17 | 2006-01-05 | Fuji Photo Film Co Ltd | Liquid crystal display device |
| JP2010078843A (en) * | 2008-09-25 | 2010-04-08 | Nitto Denko Corp | Optical film winding original roll, and method of manufacturing the same |
| US8379308B2 (en) | 2008-09-25 | 2013-02-19 | Nitto Denko Corporation | Rolled web of optical film and method of producing the same |
| CN103403586A (en) * | 2011-11-11 | 2013-11-20 | 住友化学株式会社 | Optical film chip cutting device and method for cutting optical film chip |
| CN103403586B (en) * | 2011-11-11 | 2015-04-22 | 住友化学株式会社 | Optical film chip cutting device and method for cutting optical film chip |
| JP2016513272A (en) * | 2013-02-06 | 2016-05-12 | ドングウー ファイン−ケム カンパニー、 リミテッドＤｏｎｇｗｏｏ Ｆｉｎｅ−Ｃｈｅｍ Ｃｏ．， Ｌｔｄ． | Polarizing plate and liquid crystal display device including the same |
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