发明名称 |
Fabrication process for cholesteric liquid crystal media having a volume hologram |
摘要 |
A volume hologram layer (2) is formed on a substrate (1), and a cholesteric liquid crystal layer (3) is then formed on the hologram layer (2). After the substrate (1) is peeled off the volume hologram layer (2), an adhesive layer (4) is formed on the surface of the volume hologram layer (2) with the substrate (1) peeled off, and another substrate (5) is then formed on the adhesive layer (4). Finally, a label form of cholesteric liquid crystal medium having a volume hologram is shaped out of the resulting multilayer structure; it is thus possible to fabricate cholesteric liquid crystal media having a volume hologram with efficiency yet without recourse to any complicated steps such as an alignment step. |
申请公布号 |
US8808945(B2) |
申请公布日期 |
2014.08.19 |
申请号 |
US200612065999 |
申请日期 |
2006.09.05 |
申请人 |
Dai Nippon Printing Co., Ltd. |
发明人 |
Watanabe Masachika;Umeya Masanori;Eto Koji;Yamauchi Tsuyoshi |
分类号 |
G03H1/02;G02B5/30;G09F3/02;B42D15/10;G03H1/00;G09F3/00 |
主分类号 |
G03H1/02 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. A fabrication process for a cholesteric liquid crystal medium having a volume hologram, which has a double-layer structure of a volume hologram layer
and a cholesteric liquid crystal layer, characterized by comprising steps of: forming a volume hologram layer on a first substrate; forming a cholesteric liquid crystal layer on said volume hologram layer by coating a liquid crystalline composition followed by orienting and curing; peeling said first substrate off; forming an adhesive layer on a surface of said volume hologram layer, off which said first substrate has been peeled; and providing a second substrate on said adhesive layer wherein no layer or film exists between the volume hologram layer and the cholesteric liquid crystal layer, wherein the liquid crystalline composition includes a polymerizable liquid crystal material of nematic order, a chiral agent and photopolymerization initiators and wherein the chiral agent is incapable of polymerization, has a MW of 1500 or less and is selected from either a compound having at least one asymmetric carbon atom or a compound having an optically active site having axial symmetry. |
地址 |
Tokyo JP |