Title:
OPTICALLY ANISOTROPIC LAYER
Document Type and Number:
WIPO Patent Application WO/2022/030308
Kind Code:
A1
Abstract:
The present invention provides an optically anisotropic layer which has two layers having different orientation states of a liquid crystal compound in the thickness direction and in which in-plane optical unevenness is reduced. An optically anisotropic layer of the present invention is formed by using a liquid crystal compound, the optically anisotropic layer having a first layer and a second layer along the thickness direction, the second layer being in direct contact with the first layer, wherein: the orientation state of the liquid crystal compound in the first layer is different from the orientation state of the liquid crystal compound in the second layer; a region within the largest square which can be drawn on the surface of the optically anisotropic layer is subdivided into 64 square subregions of the same area; the thickness d1 of the first layer and the thickness d2 of the second layer at the center position of the sub-region are obtained, and X represented by expression (1) is calculated for each sub-region; and among 64 calculated Xs, the relationship of expression (2A) is satisfied, the maximum value is Xmax, and the minimum value is Xmin. Expression (1) X = d1/(d1 + d2)
Expression (2A) Xmax/Xmin < 1.10
Inventors:
YOSHIDA SHINPEI (JP)
TAKAHASHI YUTA (JP)
YAMURA KENTARO (JP)
KODAMA KEISUKE (JP)
TAKAHASHI YUTA (JP)
YAMURA KENTARO (JP)
KODAMA KEISUKE (JP)
Application Number:
PCT/JP2021/027756
Publication Date:
February 10, 2022
Filing Date:
July 27, 2021
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/30
Domestic Patent References:
| WO2016017728A1 | 2016-02-04 | |||
| WO2020066910A1 | 2020-04-02 |
Foreign References:
| JP2004258623A | 2004-09-16 | |||
| JP2015161714A | 2015-09-07 | |||
| JP2006078617A | 2006-03-23 | |||
| JP2016539374A | 2016-12-15 | |||
| US20100059709A1 | 2010-03-11 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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