公开(公告)号：EP1780193A1

公开(公告)日：2007-05-02

申请号：EP05766309.8

申请日：2005-07-15

Applicant: Japan Science and Technology Agency

Inventor： CAMPBELL, Neil ,  YAMAMOTO, Jun ,  YOKOYAMA, Hiroshi

IPC: C07C43/192 ,  C07C41/16 ,  C09K19/30 ,  G02F1/13

CPC classification number: C09K19/3048 ,  C09K19/3001 ,  C09K19/3003 ,  C09K19/3028 ,  C09K19/3066 ,  C09K2019/0444 ,  Y10T428/10

Abstract: The present invention provides a liquid crystal material, method for producing the liquid crystal material, and liquid crystal device thereof which shows low light absorption in the ultraviolet light region. A compound of formula (I)

wherein R is an alkyl or alkenyl group which is optionally interposed with one or more oxygen or sulphur atoms, Y is independently selected from oxygen or sulphur, n is an integer of from 2 to 8, X is a direct bond, C 1-4 alkylene or C 2-4 alkenylene, and A is selected from a various specified ring structures. The liquid crystal material (compounds) are of low birefringence and are U.V. stable and are useful in liquid crystal devices that need low birefringence such as reflective displays, or which are exposed to high levels of U.V. light such as phosphor display cells.

Abstract translation: 本发明提供的液晶材料，用于制造液晶材料的方法，以及液晶装置的其示出了在紫外光区域低的光吸收。 式（I）其中R是任选被一个或多个氧或硫原子插入的烷基或链烯基的化合物，Y独立地选自氧或硫，n是从2至8的整数，X是 直接键，C 1-4亚烷基或C 2-4亚烯基，并且A是由各种特定的环结构中选择。 液晶材料（化合物）是低双折射的并且是U.V. 稳定的，并且在液晶器件是有用的并需要低双折射：如反射式显示器，或暴露于高浓度的紫外线 光：如磷显示单元。

公开(公告)号：EP1300720B1

公开(公告)日：2016-03-16

申请号：EP01947920.3

申请日：2001-07-09

Applicant: Japan Science and Technology Agency

Inventor： YONEYA, Makoto ,  KIM, Jong-Hyun ,  YOKOYAMA, Hiroshi ,  YAMAMOTO, Jun

IPC: G02F1/1337 ,  G02F1/1343 ,  G02F1/139

CPC classification number: G02F1/1391 ,  G02F1/133753 ,  G02F1/134363 ,  G02F1/1392 ,  G02F2001/133749 ,  G02F2001/133757

公开(公告)号：EP1780193B1

公开(公告)日：2010-05-19

申请号：EP05766309.8

申请日：2005-07-15

Applicant: Japan Science and Technology Agency

Inventor： CAMPBELL, Neil ,  YAMAMOTO, Jun ,  YOKOYAMA, Hiroshi

IPC: C07C43/192 ,  C07C41/16 ,  C09K19/30 ,  G02F1/13

CPC classification number: C09K19/3048 ,  C09K19/3001 ,  C09K19/3003 ,  C09K19/3028 ,  C09K19/3066 ,  C09K2019/0444 ,  Y10T428/10

Abstract: Disclosed is a liquid crystal material which has low optical absorption in the ultraviolet region. Also disclosed are a method for producing a liquid crystal material and a liquid crystal device. Specifically disclosed is a compound represented by the following chemical formula (I): wherein R represents an alkyl group or alkenyl group arbitrarily containing one or more oxygen or sulfur atoms, Y is independently selected from oxygen and sulfur, n is an integer of 2-8, X represents a direct bond, a C1-4 alkylene or a C2-4 alkenylene, and A is selected from various specific cyclic structures. This liquid crystal material (compound) has low birefringence and is stable to ultraviolet radiation. Consequently, the liquid crystal material is useful for liquid crystal devices requiring low birefringence such as reflective displays and liquid crystal devices exposed to high-level ultraviolet radiation such as fluorescent display cells.

公开(公告)号：EP1385040B1

公开(公告)日：2007-07-18

申请号：EP01980926.8

申请日：2001-10-29

Applicant: Japan Science and Technology Agency

Inventor： YOKOYAMA, Hiroshi ,  YAMAMOTO, Jun ,  LACHEZAR, Komitov

IPC: G02F1/13

CPC classification number: G02F1/133362 ,  C09K19/24 ,  G02F1/133734 ,  Y10T428/10

Abstract: A photoinductive switching liquid crystal device in which a bistable in-plane switching phenomenon caused by competition of anchoring forces in an SiOx substrate is combined with an anchoring transfer phenomenon caused by conventional photoanisotropy of azo benzene liquid crystal molecules and optical anisotropic axis of dichroic nematic liquid crystal is switched by light in a horizontal plane. The inventive photoinductive switching liquid crystal device is applicable to general optical application technologies, e.g. optical communication and optical memory, as well as a liquid crystal device.