JP2006350113A - Diffusion film arranged on liquid crystal panel of liquid crystal display, and on backlight of transmissive liquid crystal display - Google Patents

Diffusion film arranged on liquid crystal panel of liquid crystal display, and on backlight of transmissive liquid crystal display Download PDF

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JP2006350113A
JP2006350113A JP2005178134A JP2005178134A JP2006350113A JP 2006350113 A JP2006350113 A JP 2006350113A JP 2005178134 A JP2005178134 A JP 2005178134A JP 2005178134 A JP2005178134 A JP 2005178134A JP 2006350113 A JP2006350113 A JP 2006350113A
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liquid crystal
crystal display
polymer resin
molecular orientation
craze
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Yoji Nakajima
洋司 中島
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NAKAJIMA KOGYO KK
Nakashima Kogyo Corp
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NAKAJIMA KOGYO KK
Nakashima Kogyo Corp
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<P>PROBLEM TO BE SOLVED: To provide a viewing angle compensation film with which such higher quality of a picture as viewed from a position in an oblique direction than that viewed from the front is created by arranging it on a liquid crystal panel of a liquid crystal display. <P>SOLUTION: The viewing angle of the liquid crystal panel is improved by making crazes having a property to diffuse light be manifested on a polymer resin film with transparency and arranging the film on the liquid crystal panel of the liquid crystal display. Directions of the crazes opposite to the liquid crystal panel are diversified, and consequently viewing angle improvement, with which such quality of the picture as viewed from a position in the oblique direction is no less high than that viewed from the front is created, is materialized. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は液晶ディスプレイの液晶パネル並びに透過型液晶ディスプレイのバックライトに配置される、拡散フィルムに関する。   The present invention relates to a diffusion film disposed in a liquid crystal panel of a liquid crystal display and a backlight of a transmissive liquid crystal display.

従来より液晶ディスプレイ(LCD)は、軽量である点、消費電力が少ない等の特徴を有することから、ノートパソコン、モニター等に広く活用され、さらに金融機関におけるATM、家庭用テレビ、スクリーン等にも普及が図られている。   Conventionally, liquid crystal displays (LCD) have features such as light weight and low power consumption, so they are widely used for notebook computers, monitors, etc., and also for ATMs, home TVs, screens, etc. in financial institutions. Popularized.

液晶ディスプレイ(LCD)は、CRTと比較して、正面から見た場合にはCRTを超える画質が得られるようになってきている反面、左右、上下などの斜め方向から見た場合のコントラスト低下や色相の変化といった視角特性が十分でないため、この改良が多方面から進められている。   Compared with CRT, liquid crystal display (LCD) has been able to obtain image quality that exceeds CRT when viewed from the front, but contrast reduction when viewed from diagonal directions such as left and right, up and down, etc. Since the viewing angle characteristics such as hue change are not sufficient, this improvement has been promoted from various aspects.

LCDの視角改良をする方法としては、マイクロレンズにより正面方向の映像を全方向に広げる方法や、特開平8‐292322号公報に見られるように散乱に方向依存性のある光学フィルムを用い、散乱により視角を拡大する方法、特開平10‐186109号公報には、非晶性熱可塑性樹脂を降伏応力の80%以上100%未満の応力下で30mm/秒以下の変形速度で一軸延伸することによって、配向方向と直交する方向に特定形状のクレーズを有する拡散フィルムを用いることが開示されている。   As a method for improving the viewing angle of the LCD, a method of expanding the image in the front direction in all directions by using a microlens, or an optical film having a direction dependency on scattering as shown in JP-A-8-292322 is used. JP-A-10-186109 discloses a method for expanding the viewing angle by uniaxially stretching an amorphous thermoplastic resin at a deformation rate of 30 mm / second or less under a stress of 80% to less than 100% of the yield stress. The use of a diffusion film having a specific shape of craze in a direction orthogonal to the orientation direction is disclosed.

液晶パネルの裏側から光をあて、画面に像を映し出す、透過型液晶ディスプレイのバックライトは、ランプをそのまま液晶パネル照射すると、明るさ(輝度)にムラなどが生じ、液晶パネル画面が見にくくなる。この状態を解消する目的で、バックライトには、ランプの光が通る方向面に光を拡散させる拡散板、光量を低減するライトカーテン、光量を増強させるプリズムシートなどが配置されている。   The backlight of a transmissive liquid crystal display that projects light onto the screen by applying light from the back side of the liquid crystal panel causes unevenness in brightness (brightness) when the lamp is irradiated as it is, making it difficult to see the liquid crystal panel screen. In order to eliminate this state, the backlight is provided with a diffusing plate that diffuses light in a direction plane through which light from the lamp passes, a light curtain that reduces the amount of light, a prism sheet that increases the amount of light, and the like.

ランプをサイド(側面)に配置するサイドライト方式バックライトにおいては、ランプがサイドにあるために横方向の光を縦方向の光に変換する導光板が必要となる。導光板の底部には光を上辺方向に変えるために反射フィルムが配置され、その反射フィルムの効率を上げるために散乱パターンが導光板の底辺に印刷、あるいは、射出成形にて作られている。   In the sidelight type backlight in which the lamp is disposed on the side (side surface), since the lamp is on the side, a light guide plate that converts horizontal light into vertical light is required. A reflection film is disposed at the bottom of the light guide plate in order to change the light in the upper side direction, and a scattering pattern is formed on the bottom side of the light guide plate by printing or injection molding in order to increase the efficiency of the reflection film.

特開平08‐292322号公報Japanese Patent Laid-Open No. 08-292322 特開平10‐186109号公報JP-A-10-186109 鈴木八十二著「液晶の本」日刊工業新聞社 2003年Hachijiki Suzuki “Liquid Crystal Book” Nikkan Kogyo Shimbun, 2003

前記、マイクロレンズを用いる方法や特開平8‐292322号公報に記載の方法は、LCDの視角改良に効果は認められるが、工業的に生産するに際しては、高度の技術を必要とし、また比較的高価になることから必ずしも十分満足できるものではなく、また、特開平10‐186109号公報に記載の方法は、非晶性熱可塑性樹脂を一軸延伸することによって、配向方向と直交する方向に特定形状のクレーズを有する拡散フィルムが開示されているが一軸延伸の場合にはクレーズの方向は常に配向方向と平行に生成されるため左右、上下からの視角改良が十分なされたものとはなっていない。   The above-described method using a microlens and the method described in Japanese Patent Application Laid-Open No. 8-292322 are recognized to be effective for improving the viewing angle of an LCD. The method described in Japanese Patent Application Laid-Open No. 10-186109 is not always satisfactory because it is expensive, and the method described in Japanese Patent Laid-Open No. 10-186109 is uniaxially stretched with an amorphous thermoplastic resin to form a specific shape in a direction perpendicular to the orientation direction However, in the case of uniaxial stretching, the crazing direction is always generated in parallel with the orientation direction, so that the viewing angle from the left, right, and top and bottom is not sufficiently improved.

本発明は、このような従来の問題を解決しようとするもので、液晶ディスプレイのパネルに配することにより正面から見た場合に劣らない画質を創りだす拡散フィルムを提供することと、透過型液晶ディスプレイのバックライトに配置することによりランプの光が通る方向面に光を拡散させる拡散部材を軽量、薄化するとともに、安価で提供することにある。   The present invention is intended to solve such a conventional problem, and provides a diffusion film that creates an image quality not inferior when viewed from the front by being disposed on a panel of a liquid crystal display, and a transmissive liquid crystal. A light diffusing member that diffuses light in a direction plane through which light from a lamp passes by being disposed in a backlight of a display is light and thin, and is provided at a low cost.

上記目的を達成するための本発明の拡散フィルムは、高分子樹脂フィルムを素材に採用することにより軽量化、薄化などを図るとともに、高分子樹脂フィルムに生成されるクレーズの方向を多方向にすることにより液晶ディスプレイの液晶パネルの視角改良をなし得たものである。   In order to achieve the above object, the diffusion film of the present invention achieves weight reduction and thinning by adopting a polymer resin film as a material, and the directions of crazes generated in the polymer resin film are multidirectional. As a result, the viewing angle of the liquid crystal panel of the liquid crystal display can be improved.

請求項1に記載の発明は、少なくとも2枚のクレーズが生成された透明性を有する高分子樹脂フィルムが、クレーズが直交する状態に積層されていることを特徴とする、液晶ディスプレイのパネルに用いられる拡散フィルムである。パネルの左右、上下方向にクレーズの生成方向を直交して配することにより左右、上下方向の視角改良がなされる。   The invention according to claim 1 is used for a panel of a liquid crystal display, wherein a polymer resin film having transparency in which at least two crazes are formed is laminated in a state in which the crazes are orthogonal to each other. Diffusion film. Viewing angles in the left and right and up and down directions are improved by arranging the craze generation directions orthogonal to the left and right and up and down directions of the panel.

請求項2に記載の発明は、二軸の分子配向をもつ透明性を有する高分子樹脂フィルムに、各々の分子配向方向と略平行にクレーズを生成させたことを特徴とする、液晶ディスプレイの液晶パネルに用いられる拡散フィルムである。クレーズが二方向より直交された状態で高分子樹脂フィルムに生成されることにより、液晶パネルの左右、上下方向にクレーズの生成方向を直交して配した場合に、液晶パネルの左右、上下方向の視角改良がなされる。   The invention according to claim 2 is characterized in that a craze is generated in a polymer resin film having transparency with biaxial molecular orientation and substantially parallel to each molecular orientation direction. It is a diffusion film used for a panel. By producing the polymer resin film in a state where the craze is orthogonal to the two directions, when the craze generation direction is orthogonal to the left and right and up and down directions of the liquid crystal panel, the left and right and up and down directions of the liquid crystal panel are arranged. The viewing angle is improved.

請求項3に記載の発明は、無軸の分子配向を有する高分子樹脂フィルムに、クレーズを生成させたことを特徴とする、液晶ディスプレイの液晶パネルに用いられる拡散フィルムである。この拡散フィルムは、高分子樹脂フィルムに生成されるクレーズの方向が一定ではないことから、液晶パネルに配することにより、多方向からの視角改良がなされる。   The invention according to claim 3 is a diffusion film used for a liquid crystal panel of a liquid crystal display, characterized in that a craze is generated in a polymer resin film having non-axial molecular orientation. Since the direction of the craze produced | generated to a polymer resin film is not constant, this diffusion film improves the viewing angle from multiple directions by arranging it in a liquid crystal panel.

請求項4に記載の発明は、少なくとも2枚の一軸の分子配向をもつ透明性を有する高分子樹脂フィルムが、分子配向の方向が直交する状態に積層されており、各々分子配向方向と略平行にクレーズを生成させたことを特徴とする、液晶ディスプレイの液晶パネルに用いられる拡散フィルムである。少なくとも2枚の、一軸の分子配向を有する高分子樹脂フィルムが、分子配向の方向が直交する状態に積層させた後、各々軸方向と平行にクレーズを生成させることにより、2方向の収縮率が均一な拡散フィルムが得られ、液晶パネルに配置することにより、多方向からの均一な視角改良がなされる。   The invention according to claim 4 is characterized in that at least two transparent polymer resin films having uniaxial molecular orientation are laminated in a state where the molecular orientation directions are orthogonal to each other, and each is substantially parallel to the molecular orientation direction. A diffusion film for use in a liquid crystal panel of a liquid crystal display, characterized in that crazes are produced. At least two polymer resin films having uniaxial molecular orientation are laminated in a state where the molecular orientation directions are orthogonal to each other, and then a craze is generated in parallel with each axial direction, whereby the shrinkage rate in two directions is increased. A uniform diffusion film can be obtained, and the viewing angle can be improved uniformly from multiple directions by disposing it on the liquid crystal panel.

請求項5に記載の発明は、少なくとも2枚のクレーズが生成された透明性を有する高分子樹脂フィルムが、クレーズが直交する状態に積層されていることを特徴とする、透過型液晶ディスプレイのバックライトに配置される拡散フィルムである。従来の拡散板と比較して本発明の拡散フィルムは素材が透明性を有する高分子樹脂からなるフィルムであり、軽量化と薄化をなし得るとともに透明性を有することから画面の明るさの向上にも寄与するものとなっている。さらに、クレーズが二方向より直交された状態で高分子樹脂フィルムに生成されることにより、ムラのない光の拡散がなされる。   According to a fifth aspect of the present invention, there is provided a back of a transmissive liquid crystal display, wherein a transparent polymer resin film having at least two crazes formed thereon is laminated in a state in which the crazes are orthogonal to each other. It is a diffusion film placed on the light. Compared with the conventional diffusion plate, the diffusion film of the present invention is a film made of a polymer resin having transparency, which can be reduced in weight and thickness, and has transparency, thus improving the brightness of the screen. Has also contributed. Furthermore, light is generated without unevenness by being produced on the polymer resin film in a state where the craze is orthogonal to the two directions.

また、少なくとも2枚の、一軸の分子配向を有する高分子樹脂フィルムが、分子配向の方向が直交する状態に積層させた後、各々軸方向と平行にクレーズを生成させることにより、2方向の収縮と膨張が抑制される。   In addition, at least two polymer resin films having a uniaxial molecular orientation are laminated in a state in which the molecular orientation directions are orthogonal to each other, and then a craze is generated in parallel with each axial direction, thereby contracting in two directions. And expansion is suppressed.

請求項6に記載の発明は、二軸の分子配向をもつ透明性を有する高分子樹脂フィルムに、各々の分子配向方向と略平行にクレーズを生成させたことを特徴とする、透過型液晶ディスプレイのバックライトに配置される拡散フィルムである。従来の拡散板と比較して本発明の拡散フィルムは素材が透明性を有する高分子樹脂からなるフィルムであり、軽量化と薄化をなし得るとともに透明性を有することから画面の明るさの向上にも寄与するものとなっている。さらに、クレーズが二方向より直交された状態で高分子樹脂フィルムに生成されることにより、ムラのない光の拡散がなされる。   The invention according to claim 6 is a transmissive liquid crystal display characterized in that a craze is generated in a polymer resin film having transparency with biaxial molecular orientation substantially parallel to each molecular orientation direction. It is a diffusion film arrange | positioned at the backlight of this. Compared with the conventional diffusion plate, the diffusion film of the present invention is a film made of a polymer resin having transparency, which can be reduced in weight and thickness, and has transparency, thus improving the brightness of the screen. Has also contributed. Furthermore, light is generated without unevenness by being produced on the polymer resin film in a state where the craze is orthogonal to the two directions.

請求項7に記載の発明は、無軸の分子配向をもつ透明性を有する高分子樹脂フィルムに、クレーズを生成させたことを特徴とする、透過型液晶ディスプレイのバックライトに配置される拡散フィルムである。従来の拡散板と比較して本発明の拡散フィルムは素材が透明性を有する高分子樹脂からなるフィルムであり、軽量化と薄化をなし得るとともに透明性を有することから画面の明るさの向上にも寄与するものとなっている。さらに、クレーズが二方向より直交された状態で高分子樹脂フィルムに生成されることにより、ムラのない光の拡散がなされる。   The invention according to claim 7 is a diffusion film disposed in a backlight of a transmissive liquid crystal display, characterized in that a craze is generated in a polymer resin film having transparency with non-axial molecular orientation. It is. Compared with the conventional diffusion plate, the diffusion film of the present invention is a film made of a polymer resin having transparency, which can be reduced in weight and thickness, and has transparency, thus improving the brightness of the screen. Has also contributed. Furthermore, light is generated without unevenness by being produced on the polymer resin film in a state where the craze is orthogonal to the two directions.

請求項8に記載の発明は、少なくとも2枚の一軸の分子配向をもつ透明性を有する高分子樹脂フィルムが、分子配向の方向が直交する状態に積層されており、各々分子配向方向と略平行にクレーズを生成させたことを特徴とする、透過型液晶ディスプレイのバックライトに配置される拡散フィルムである。従来の拡散板と比較して本発明の拡散フィルムは素材が透明性を有する高分子樹脂からなるフィルムであり、軽量化と薄化をなし得るとともに透明性を有することから画面の明るさの向上にも寄与するものとなっている。さらに、クレーズが二方向より直交された状態で高分子樹脂フィルムに生成されることにより、ムラのない光の拡散がなされる。   According to an eighth aspect of the invention, at least two transparent polymer resin films having uniaxial molecular orientation are laminated in a state in which the molecular orientation directions are orthogonal to each other, and each is substantially parallel to the molecular orientation direction. A diffusing film disposed in a backlight of a transmissive liquid crystal display, characterized in that crazes are generated. Compared with the conventional diffusion plate, the diffusion film of the present invention is a film made of a polymer resin having transparency, which can be reduced in weight and thickness, and has transparency, thus improving the brightness of the screen. Has also contributed. Furthermore, light is generated without unevenness by being produced on the polymer resin film in a state where the craze is orthogonal to the two directions.

また、少なくとも2枚の、一軸の分子配向を有する高分子樹脂フィルムが、分子配向の方向が直交する状態に積層させた後、各々軸方向と平行にクレーズを生成させることにより、2方向の収縮と膨張が抑制される。   In addition, at least two polymer resin films having a uniaxial molecular orientation are laminated in a state in which the molecular orientation directions are orthogonal to each other, and then a craze is generated in parallel with each axial direction, thereby contracting in two directions. And expansion is suppressed.

本発明の拡散フィルムは、液晶パネルの視角改良を成し得るとともに、工業的に生産するに際しても、従来の技術と比較して高度の技術を必要とせず容易に製造することができことから大量生産に適しており、コストの削減に繋がる。さらには、フィルムの素材となる高分子樹脂の種類を選定し、着色、抗菌処理などを施すことにより様々な用途での使用が期待される。   The diffusion film of the present invention can improve the viewing angle of a liquid crystal panel, and can be easily manufactured without requiring a high level of technology as compared with the conventional technology when industrially produced. Suitable for production, leading to cost reduction. Furthermore, it is expected to be used in various applications by selecting the type of polymer resin that will be the raw material of the film and applying it to coloring and antibacterial treatment.

以下、本発明の拡散フィルムについて詳細に説明するが、これは代表的なものを示したものであり、実施例により本発明が限定されるものではない。   Hereinafter, although the diffusion film of this invention is demonstrated in detail, this shows a typical thing and this invention is not limited by the Example.

本発明の拡散フィルムは、一般に市販されている厚さ25μmのポリフッ化ビニリデンなどのような透明性の高分子樹脂フィルムに、分子配向方向と略平行に20μm程度の間隔を有するクレーズが生成されている。このクレーズは、同高分子樹脂フィルムの表面だけでなくその厚さ方向に連通している。   In the diffusion film of the present invention, a craze having an interval of about 20 μm is formed on a transparent polymer resin film such as polyvinylidene fluoride having a thickness of 25 μm that is generally commercially available. Yes. This craze communicates not only on the surface of the polymer resin film but also in its thickness direction.

高分子樹脂フィルムに形成されるクレーズを、図1に示し詳しく説明する。クレーズ20は、高分子樹脂フィルム10の表面に現れる表面クレーズと内部に発生する内部クレーズを含むものであって、微細なひび状の模様を有する領域を言う。このクレーズは分子束(フィブリル)24とひび割れに似た多数の微細な連通孔(ボイド)22から構成されており、連通孔は一定ではなくとも0.02〜0.15nm程度に、高分子樹脂フィルムの厚み方向に連通している。   The craze formed on the polymer resin film is shown in FIG. 1 and will be described in detail. The craze 20 includes a surface craze appearing on the surface of the polymer resin film 10 and an internal craze generated inside, and refers to a region having a fine crack-like pattern. This craze is composed of molecular bundles (fibrils) 24 and a large number of fine communication holes (voids) 22 similar to cracks, and the communication holes are not constant but are about 0.02 to 0.15 nm. It communicates in the thickness direction of the film.

本発明の拡散フィルムに用いる透明性の高分子樹脂フィルムとしては、ポリフッ化ビニリデンを採用するのが望ましい。ポリフッ化ビニリデンは、低温から高温まで広い使用温度範囲をもち、可撓性を有すると共に力学的に優れ、耐候性も極めて良く長期において透明度及び可撓性が変わらず、さらに耐薬品性にも優れる。   As the transparent polymer resin film used for the diffusion film of the present invention, it is desirable to employ polyvinylidene fluoride. Polyvinylidene fluoride has a wide operating temperature range from low temperature to high temperature, has flexibility and excellent mechanical properties, extremely excellent weather resistance, transparency and flexibility in the long term, and excellent chemical resistance .

ポリフッ化ビニリデン以外にも、ポリスチレン、ポリエチレン、ポリプロピレン、ポリエステル、ポリアミド等の透明性の高分子樹脂フィルムは、クレーズを生成することが容易であり、採用に適した高分子樹脂フィルムといえる。   In addition to polyvinylidene fluoride, a transparent polymer resin film such as polystyrene, polyethylene, polypropylene, polyester, and polyamide can be easily produced as a craze and can be said to be a polymer resin film suitable for use.

次に、この拡散フィルムの製造方法の一実施例を以下に説明する。緊張状態に保持された前記市販のポリフッ化ビニリデンなどのような透明性の高分子樹脂フィルム面に、先端部が鋭角(50度以下がクレーズ生成の観点から好ましい)なエッジを分子配向方向と略平行に押し付けるように当接して該フィルムを局部的に折り曲げ、その状態で分子配向方向と略直角の方向に移動させることにより該フィルム中にクレーズが生成される。   Next, an example of the method for producing the diffusion film will be described below. On the surface of the transparent polymer resin film such as the above-mentioned commercially available polyvinylidene fluoride held in a tension state, an edge with an acute angle (preferably 50 degrees or less is preferable from the viewpoint of craze formation) is approximately the molecular orientation direction. The film is locally bent by being abutted so as to be pressed in parallel, and in this state, craze is generated in the film by moving it in a direction substantially perpendicular to the molecular orientation direction.

該クレーズを分子配向の方向と略平行の方向に形成するのは、分子鎖の配向の方向と直角の方向に引っ張るほうがクレーズの形成が容易であることによる。   The reason why the craze is formed in a direction substantially parallel to the direction of molecular orientation is that the formation of the craze is easier when the craze is pulled in the direction perpendicular to the direction of molecular chain orientation.

本発明の拡散フィルムでは透過する光や入射する光が拡散され、反射光の発生が抑制される。これにより屋内、屋外に限定されることなくパネルの視認が容易なものとなる。したがって携帯電話、ビデオカメラのモニター等への利用が期待される。   In the diffusion film of the present invention, transmitted light and incident light are diffused, and generation of reflected light is suppressed. This makes it easy to visually recognize the panel without being limited to indoors and outdoors. Therefore, it is expected to be used for mobile phones and video camera monitors.

本発明に係る拡散フィルムの1実施例の要部拡大平面図である。It is a principal part enlarged plan view of one Example of the diffusion film which concerns on this invention.

符号の説明Explanation of symbols

10 高分子樹脂フィルム
20 クレーズ
22 微細な連通孔(ボイド)
24 分子束(フィブリル)
26 拡散フィルム
10 Polymer resin film 20 Craze 22 Fine communication hole (void)
24 Molecular bundles (fibrils)
26 Diffusion film

Claims (8)

少なくとも2枚の、クレーズが生成された透明性を有する高分子樹脂フィルムが、クレーズが直交する状態に積層されていることを特徴とする、液晶ディスプレイの液晶パネルに配置される拡散フィルム。   A diffusion film disposed on a liquid crystal panel of a liquid crystal display, wherein at least two polymer resin films having transparency in which crazes are formed are laminated so that the crazes are orthogonal to each other. 二軸の分子配向をもつ透明性を有する高分子樹脂フィルムに、各々の分子配向方向と略平行にクレーズを生成させたことを特徴とする、液晶ディスプレイの液晶パネルに配置される拡散フィルム。   A diffusion film disposed on a liquid crystal panel of a liquid crystal display, wherein a craze is generated in a polymer resin film having transparency with biaxial molecular orientation substantially parallel to each molecular orientation direction. 無軸の分子配向をもつ透明性を有する高分子樹脂フィルムに、クレーズを生成させたことを特徴とする、液晶ディスプレイの液晶パネルに配置される拡散フィルム。   A diffusion film disposed on a liquid crystal panel of a liquid crystal display, wherein a craze is formed on a transparent polymer resin film having non-axial molecular orientation. 少なくとも2枚の一軸の分子配向をもつ透明性を有する高分子樹脂フィルムが、分子配向の方向が直交する状態に積層されており、各々分子配向方向と略平行にクレーズを生成させたことを特徴とする、液晶ディスプレイの液晶パネル配置される拡散フィルム。   A transparent polymer resin film having at least two uniaxial molecular orientations is laminated in a state where the molecular orientation directions are orthogonal to each other, and crazes are generated substantially parallel to the molecular orientation directions, respectively. A diffusion film disposed on a liquid crystal panel of a liquid crystal display. 少なくとも2枚の、クレーズが生成された透明性を有する高分子樹脂フィルムが、クレーズが直交する状態に積層されていることを特徴とする、透過型液晶ディスプレイのバックライトに配置される拡散フィルム。   A diffusion film disposed in a backlight of a transmissive liquid crystal display, wherein at least two polymer resin films having transparency in which crazes are formed are laminated so that the crazes are orthogonal to each other. 二軸の分子配向をもつ透明性を有する高分子樹脂フィルムに、各々の分子配向方向と略平行にクレーズを生成させたことを特徴とする、透過型液晶ディスプレイのバックライトに配置される拡散フィルム。   A diffusing film disposed in a backlight of a transmissive liquid crystal display, characterized in that a polymer resin film having biaxial molecular orientation and having transparency is produced with a craze substantially parallel to each molecular orientation direction. . 無軸の分子配向をもつ透明性を有する高分子樹脂フィルムに、クレーズを生成させたことを特徴とする、透過型液晶ディスプレイのバックライトに配置される拡散フィルム。   A diffusion film disposed in a backlight of a transmissive liquid crystal display, wherein a craze is formed on a polymer resin film having transparency with non-axial molecular orientation. 少なくとも2枚の一軸の分子配向をもつ透明性を有する高分子樹脂フィルムが、分子配向の方向が直交する状態に積層されており、各々分子配向方向と略平行にクレーズを生成させたことを特徴とする、透過型液晶ディスプレイのバックライトに配置される拡散フィルム。
A transparent polymer resin film having at least two uniaxial molecular orientations is laminated in a state in which the molecular orientation directions are orthogonal to each other, and crazes are generated substantially parallel to the molecular orientation directions, respectively. A diffusion film disposed in a backlight of a transmissive liquid crystal display.
JP2005178134A 2005-06-17 2005-06-17 Diffusion film arranged on liquid crystal panel of liquid crystal display, and on backlight of transmissive liquid crystal display Pending JP2006350113A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939886A1 (en) 2006-12-26 2008-07-02 Sony Corporation Storage element and memory
JP2010280183A (en) * 2009-06-05 2010-12-16 Furukawa Electric Co Ltd:The Resin molded product and method for manufacturing the same
JP2013160917A (en) * 2012-02-03 2013-08-19 Skg:Kk Rear surface member for display member, and display member
JP2015166868A (en) * 2010-03-12 2015-09-24 エルジー・ケム・リミテッド Optical sheet with enhanced durability, and backlight unit including same
JP2018146674A (en) * 2017-03-02 2018-09-20 王子ホールディングス株式会社 Reflection display body and inventory tag

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Publication number Priority date Publication date Assignee Title
JPH0682607A (en) * 1992-09-03 1994-03-25 Minoru Miwa Visual field selective film and its production
JPH09281306A (en) * 1996-04-10 1997-10-31 Kimoto & Co Ltd Visual field control sheet and production of visual field control sheet
JPH10186109A (en) * 1996-12-25 1998-07-14 Sumitomo Chem Co Ltd Diffusion film, its production and liquid crystal display device
JP2003066206A (en) * 2001-08-27 2003-03-05 Dainippon Printing Co Ltd Enlarging member for two dimensional viewing angle, and display device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0682607A (en) * 1992-09-03 1994-03-25 Minoru Miwa Visual field selective film and its production
JPH09281306A (en) * 1996-04-10 1997-10-31 Kimoto & Co Ltd Visual field control sheet and production of visual field control sheet
JPH10186109A (en) * 1996-12-25 1998-07-14 Sumitomo Chem Co Ltd Diffusion film, its production and liquid crystal display device
JP2003066206A (en) * 2001-08-27 2003-03-05 Dainippon Printing Co Ltd Enlarging member for two dimensional viewing angle, and display device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939886A1 (en) 2006-12-26 2008-07-02 Sony Corporation Storage element and memory
JP2010280183A (en) * 2009-06-05 2010-12-16 Furukawa Electric Co Ltd:The Resin molded product and method for manufacturing the same
JP2015166868A (en) * 2010-03-12 2015-09-24 エルジー・ケム・リミテッド Optical sheet with enhanced durability, and backlight unit including same
JP2013160917A (en) * 2012-02-03 2013-08-19 Skg:Kk Rear surface member for display member, and display member
JP2018146674A (en) * 2017-03-02 2018-09-20 王子ホールディングス株式会社 Reflection display body and inventory tag

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