公开(公告)号：US20240310564A1

公开(公告)日：2024-09-19

申请号：US18674386

申请日：2024-05-24

申请人： AGC Inc.

发明人： Kenta SEKIKAWA ,  Hiromichi NAGAYAMA ,  So ISHIDO

IPC分类号： G02B5/30 ,  G02B3/00

CPC分类号： G02B5/3091 ,  G02B3/0018 ,  G02B5/3016 ,  G02B5/3041

摘要： An optical element includes a three-dimensional structure having a curved surface; and a retardation plate bent along the curved surface. The retardation plate includes a transparent substrate and a liquid crystal layer formed over the transparent substrate. The retardation plate has a slow axis and a fast axis. A glass-transition temperature, Tgne, in a slow axis direction of the retardation plate is higher than a glass-transition temperature, Tgno, in a fast axis direction of the retardation plate.

公开(公告)号：US20240151887A1

公开(公告)日：2024-05-09

申请号：US18530326

申请日：2023-12-06

申请人： AGC Inc.

发明人： Kenta SEKIKAWA ,  Hiromichi NAGAYAMA

IPC分类号： G02B5/30 ,  C09K19/38

CPC分类号： G02B5/3016 ,  C09K19/3809

摘要： A retardation plate includes a transparent substrate, and a liquid crystal layer formed over the transparent substrate, wherein, when a tensile test is performed by pulling the retardation plate in a predetermined direction at a glass-transition temperature of the transparent substrate, a tensile elongation C defined by an equation of C=(B−A)/A×100 is 12% or more, where A is an initial size of the retardation plate in the predetermined direction, and B is a size of the retardation plate in the predetermined direction when a crack penetrating the liquid crystal layer in a thickness direction occurs over a length of 1 mm or more on a surface of the liquid crystal layer.

公开(公告)号：US20230176270A1

公开(公告)日：2023-06-08

申请号：US18162909

申请日：2023-02-01

申请人： AGC Inc.

发明人： Kenta SEKIKAWA ,  Hiromichi NAGAYAMA ,  So ISHIDO

IPC分类号： G02B5/30 ,  G02B3/00

CPC分类号： G02B5/3091 ,  G02B5/3016 ,  G02B3/0018 ,  G02B5/3041

摘要： An optical element includes a three-dimensional structure having a curved surface; and a retardation plate bent along the curved surface. The retardation plate includes a transparent substrate and a liquid crystal layer formed over the transparent substrate. The retardation plate has a slow axis and a fast axis. A glass-transition temperature, Tgne, in a slow axis direction of the retardation plate is higher than a glass-transition temperature, Tgno, in a fast axis direction of the retardation plate.

公开(公告)号：US20230168543A1

公开(公告)日：2023-06-01

申请号：US18162783

申请日：2023-02-01

申请人： AGC Inc.

发明人： Kenta SEKIKAWA ,  Hiromichi NAGAYAMA ,  So ISHIDO

IPC分类号： G02F1/1337

CPC分类号： G02F1/133711 ,  G02F1/133776

摘要： An optical element includes a transparent substrate; an alignment layer formed over the transparent substrate; and a liquid crystal layer formed over the alignment layer. A plurality of grooves parallel to each other for aligning liquid crystal molecules of the liquid crystal layer are formed over a surface of the alignment layer in contact with the liquid crystal layer. A pitch of the grooves is greater than or equal to 10 nm and less than or equal to 600 nm. The alignment layer is formed of a copolymer of an energy curable composition and contains fluorine on the surface.