Optical laminated film for liquid crystal display device

A liquid crystal display device and optical layer technology, applied in optics, optical elements, nonlinear optics, etc., can solve the problems of poor contrast and poor visibility of light and dark display, and achieve excellent contrast, less glare and reflection, and light reflection. low rate effect

Inactive Publication Date: 2008-02-20
MATSUSHITA ELECTRIC WORKS LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, especially when the low-reflection resin base material described in Patent Document 2 is used for a liquid crystal display device, visibility (such as brightness) may deteriorate, and the contrast of bright and dark display may deteriorate.

Method used

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  • Optical laminated film for liquid crystal display device
  • Optical laminated film for liquid crystal display device
  • Optical laminated film for liquid crystal display device

Examples

Experimental program
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Embodiment

[0261] The present invention will be described in detail through examples, but the present invention is not limited to the following examples. Wherein, unless otherwise specified, parts are based on weight.

[0262] Evaluation of physical properties in this example was performed by the following methods.

[0263] (1) Film thickness of base film (standard film thickness, film thickness fluctuation value)

[0264] The film is cut out corresponding to every 100 mm in the length direction, and the cut out film is measured corresponding to every It measures at 0.48 mm, and makes the arithmetic mean value of the measured value into reference film thickness T (micrometer). Regarding film thickness variation (film thickness variation), the maximum value among the above-mentioned measured film thicknesses is defined as T MAX (μm), the minimum value is set to T MIN (μm), and calculated according to the following formula.

[0265] Variation in film thickness (%) = (T MAX -T MIN ) / ...

manufacture example 1

[0286] Manufacturing example 1 Fabrication of Substrate Film 1A

[0287] Norbornene-based polymer (product name "ZEONOR 1420R", produced by ZEON Corporation of Japan; glass transition temperature 136°C, saturated water absorption less than 0.01% by weight) was carried out at 110°C using a hot air dryer that circulates air. 4 hours to dry. Then, the pellets were melt-extruded at 260° C. using a short shaft extruder having a coat hanger-shaped T-die with a die lip width of 650 mm to obtain a substrate film 1A with a width of 660 mm. A disc-shaped polymer filter (filtering precision of 30 μm) is used, and chrome plating with a surface roughness of Ra=0.05 μm is performed on the inner surface of the die lip. The obtained base film 1A has a volatile component content of 0.01% by weight or less, and a saturated water absorption rate of 0.01% by weight or less. In addition, the base film 1A had a base film thickness of 40 μm, a film thickness variation of 2.3%, and a die line dept...

manufacture example 2

[0288] Manufacturing example 2 Preparation of Composition H1 for Hard Coat Formation (n d 20 =1.62)

[0289] In the modified alcohol sol of 1000 parts by weight of antimony pentoxide (30% of solid content concentration, produced by Catalyst Chemical Industry Co., Ltd.), 100 parts by weight of ultraviolet curable urethane acrylate (produced by Japan Synthetic Chemical Co., Ltd., trade name is "Ultraviolet UV7000B") is mixed. , 4 parts by weight of a photopolymerization initiator (manufactured by Ciba-Geigy, trade name "Irugakiyua-184") to obtain composition H1 for forming an ultraviolet curable hard coat layer.

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Abstract

An optical laminated film for a liquid crystal display device is provided by successively laminating a hard coat layer and a low refraction index layer including an aerogel, on one surface of a base material film including a transparent resin, directly or through other layer. The optical laminated film satisfies the following inequalities [1-3], where nH is a refraction index of the hard coat layer, and nLis a refraction index of the low refraction index layer. [1] nL=1.37 [2] nH=1.53 [3] (nH)<1 / 2>-0.2+0.2.

Description

technical field [0001] The present invention relates to an optical laminated film for liquid crystal display devices, and more particularly to an optical laminated film for liquid crystal display devices laminated with a low-refractive-index layer capable of effectively achieving low light reflectance. Background technique [0002] Polarizing films used in liquid crystal display devices (hereinafter referred to as "LCD") may be processed to provide a low-refractive index layer in order to prevent light reflection. In particular, it is required to provide a high-performance anti-reflection function to polarizing films used in LCDs used outdoors or the like. Thereby, a low-refractive-index layer of a multilayer film or a single-layer film can be formed on the surface of the base film. [0003] As a low-refractive-index layer of a multilayer film, there is a structure in which a film having a relatively high refractive index and a film having a relatively low refractive index ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/11G02B1/10G02F1/1335G02B5/30
CPCG02B1/105G02F1/133502G02B2207/107G02B1/18G02B1/16G02B1/14C09K2323/03C09K2323/00C09K2323/035G02B1/10G02F1/1335G02B5/30
Inventor 山木健之横川弘辻本光福崎僚三曾根笃丰嶋哲也吉原真纪荒川公平
Owner MATSUSHITA ELECTRIC WORKS LTD
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