Optical film, manufacturing method therefor, and polarizing plate, image display device, and 3d image display system using said optical film
A technology of optical film and polarizer, applied in the field of optical film, can solve the problems of complex production and complex process, and achieve the effect of easy production and practicality
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[0072] (1) Preparation method of optical film
[0073] For example, one exemplary method sequence for making the optical film of the present invention includes the following steps:
[0074] 1) forming an alignment film on a transparent support;
[0075] 2) rubbing the alignment film in one direction;
[0076] 3) coating a type of composition mainly composed of liquid crystals having polymerizable groups on the rubbed alignment film;
[0077] 4) At temperature T 1 heating the laminate at °C to orient the liquid crystal molecules so that their slow axes are perpendicular to the rubbing direction;
[0078] 5) exposing the laminate to ultraviolet rays through a photomask so as to fix the irradiated area in a vertical alignment state;
[0079] 6) At temperature T 2 ℃ (where T 1 2 ) to heat the laminate to orient the liquid crystal molecules in the non-irradiated regions so that their slow axes are parallel to the rubbing direction; and
[0080] 7) The laminate is irradiated ...
Embodiment 1
[0466] Preparation of transparent support provided with rubbed alignment film
[0467] A 4% polyvinyl alcohol aqueous solution (KURARAY POVAL PVA-103, manufactured by KURARAY CO., LTD.) was applied to a transparent glass support with a #12 rod, and the coating was dried at 80° C. for 5 minutes. Then, at 400 rpm, the coating was subjected to unidirectional rubbing for 3 times to prepare a glass support with a rubbed alignment film. Re(550) of the glass support was 0 nm and Rth was 0 nm, and the thickness of the alignment film was 0.9 μm.
[0468] Preparation of patterned optically anisotropic layer
[0469] A composition for an optically anisotropic layer was prepared as shown below, which was then filtered through a polypropylene filter with a pore diameter of 0.2 μm to prepare a coating liquid for an optically anisotropic layer. The coating liquid was applied, and then the coating was dried at a surface temperature of 80°C for 1 minute into a liquid crystal phase for unifor...
Embodiment 2
[0483] An optical film comprising a patterned optically anisotropic layer was prepared as in Example 1 except that the coating liquid for the optically anisotropic layer had the composition described below. The thickness of the optically anisotropic layer was 0.8 μm.
[0484] Composition of optically anisotropic layer
[0485]
[0486] Discoid liquid crystal E-2
[0487]
[0488] Air interface alignment agent (P-2)
[0489]
[0490] The direction of the slow axis of the optically anisotropic layer contained in the obtained optical film was determined as in Example 1. Table 1 shows the direction of the slow axis of the optically anisotropic layer with respect to the rubbing direction of the alignment film. The results shown in Table 1 illustrate the following phenomenon: in the presence of pyridine In the case of a copolymer of a salt compound and a fluorinated aliphatic group, the discotic liquid crystal molecules are oriented on the PVA alignment film that has b...
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Abstract
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