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Optically functional film, phase difference film, composition for formation of optically functional layer, and method for manufacture of optically functional film

A technology of optical functional layer and retardation film, which is applied in the direction of optics, nonlinear optics, layered products, etc., can solve the problem of white turbidity of the optical functional layer, and achieve high transparency, excellent adhesion, and excellent transparency Effect

Inactive Publication Date: 2008-10-01
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, the above-mentioned retardation film without an alignment film is usually coated with an optical function containing the above-mentioned rod-shaped compound on a substrate having the property of being a negative C plate. However, in the conventionally used composition for forming an optical functional layer, it is sometimes difficult to form a homogeneous random uniform orientation, and the optical functional layer is sometimes cloudy.

Method used

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  • Optically functional film, phase difference film, composition for formation of optically functional layer, and method for manufacture of optically functional film
  • Optically functional film, phase difference film, composition for formation of optically functional layer, and method for manufacture of optically functional film
  • Optically functional film, phase difference film, composition for formation of optically functional layer, and method for manufacture of optically functional film

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Experimental program
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Effect test

Embodiment 1

[0381] Dissolve 20% by mass of compound (I) represented by the following formula as a rod-shaped compound in cyclohexanone, and apply it on a substrate made of a TAC film (manufactured by Fujifilm Co., Ltd., trade name: TF80UL) by bar coating. It was applied so that the applied amount after drying would be 2.5 g / m2. Then, heating at 90° C. for 4 minutes, drying to remove the solvent, dipping the rod-shaped compound in the TAC film, and irradiating ultraviolet rays to the coated surface immobilized the rod-shaped compound to prepare a retardation film. The obtained retardation film was used as a sample, and the following items were evaluated.

[0382] [Chem 3]

[0383]

[0384] 1. Random uniform orientation

[0385] Rth and Re were measured for the prepared retardation film and the TD80UF by the parallel Nicol rotation method using KOBRA-WR manufactured by Oji Scientific Instruments Co., Ltd. About Rth and Re, the measured value of TD80UF was subtracted from the measured ...

Embodiment 2

[0399] Dissolve 20% by mass of the photopolymerizable liquid crystal compound (I) represented by the above formula (I) as a rod-shaped compound in cyclohexanone, and apply it on a non-stretched COP (cycloolefin polymer) film by bar coating (manufactured by JSR Corporation, brand name: ARTON). Then, the solvent was removed by heating at 50° C. for 2 minutes. Furthermore, the above-mentioned rod-shaped compound was immobilized by irradiating ultraviolet rays to the coated surface, and then heated at 90° C. for 2 minutes to remove the residual solvent, thereby producing a retardation film. The obtained retardation film was used as a sample, and the following items were evaluated.

[0400] 1. Random uniform orientation

[0401] With respect to the retardation layer of the produced retardation film, the presence or absence of Re and the selective reflection wavelength, Rth and haze were evaluated. The measurement was performed on the entire retardation film and the above-mention...

Embodiment 3

[0414] Dissolve 20% by mass of the photopolymerizable liquid crystal compound (I) represented by the above formula (I) as a rod-shaped compound in cyclohexanone, and apply it on a uniaxially stretched COP (cycloolefin polymer) by bar coating. On a film (manufactured by JSR Corporation, trade name: ARTON). Then, the solvent was removed by heating at 50° C. for 2 minutes. Furthermore, the above-mentioned rod-shaped compound was immobilized by irradiating ultraviolet rays to the coated surface, and then heated at 90° C. for 2 minutes to remove the residual solvent, thereby producing a retardation film. The obtained retardation film was used as a sample, and the following items were evaluated.

[0415] 1. Random uniform orientation

[0416] With respect to the retardation layer of the produced retardation film, the presence or absence of selective reflection wavelength, Rth, and haze were evaluated. The measurement was performed on the entire retardation film and the above-ment...

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Abstract

The main object is to provide an optically functional film which can exert excellent optical properties without the need of using any oriented film and has an excellent property of closely adhering to various layers and excellent display quality. The optically functional film comprises a substrate having properties required of an optically negative C-plate and an optically functional layer formed on the substrate and comprising a rod-shaped compound. The optically functional layer is formed on the substrate directly. The rod-shaped compound forms a random homogeneous orientation in the optically functional layer.

Description

technical field [0001] The present invention relates to an optical functional film used in a liquid crystal display device, etc., and a method for producing the same, and more specifically, a novel orientation form having a so-called random homogeneous orientation (Landham homogeneous alignment), and an optical functional layer and a base material. Optical functional film with superior adhesion and optical properties. Background technique [0002] Liquid crystal display devices have so-called characteristics such as power saving, light weight, and thin shape, and therefore, they have been rapidly popularized in recent years in place of conventional CRT displays. As a common liquid crystal display device, such as Figure 6 As shown, a liquid crystal display device including a polarizing plate 102A on the incident side, a polarizing plate 102B on the emitting side, and a liquid crystal cell 104 can be mentioned. The polarizing plates 102A and 102B are configured to transmit o...

Claims

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Application Information

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IPC IPC(8): G02B5/30B32B7/02C08J7/18G02F1/1335
Inventor 鹿岛启二白井贤治黑田刚志梁谷岳史
Owner DAI NIPPON PRINTING CO LTD
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