发明授权
- 专利标题: Discrimination medium and discrimination method therefor
- 专利标题(中): 歧视媒介及其歧视方法
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申请号: US11664162申请日: 2005-09-30
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公开(公告)号: US07879415B2公开(公告)日: 2011-02-01
- 发明人: Hidekazu Hoshino , Hiroyuki Matsumoto , Itsuo Takeuchi
- 申请人: Hidekazu Hoshino , Hiroyuki Matsumoto , Itsuo Takeuchi
- 申请人地址: JP Yokohama-shi
- 专利权人: NHK Spring Co., Ltd.
- 当前专利权人: NHK Spring Co., Ltd.
- 当前专利权人地址: JP Yokohama-shi
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2004-290248 20041001
- 国际申请: PCT/JP2005/018162 WO 20050930
- 国际公布: WO2006/038561 WO 20060413
- 主分类号: B44F1/10
- IPC分类号: B44F1/10
摘要:
A thermosensitive ink layer 102 is composed of a thermochromic material which changes from black to a transparent state and is formed on a substrate 101 made from a PET film by heating. A cholesteric liquid crystal layer 103 on which a hologram 105 of an appropriate form is formed on the cholesteric liquid crystal layer is mounted thereon. At ordinary temperature, the thermosensitive ink layer 102 exhibits a property of light absorption and a property of selective reflection and a color shifting of the cholesteric liquid crystal layer 103 are observed. The thermosensitive ink layer 102 becomes transparent by heating and the figure 104 on the substrate 101 is also visible. The determination of the authenticity thereof is performed by utilizing the change of view. Therefore, the anticounterfeiting effects are superior to those of the discrimination techniques using conventional techniques, and this enables articles to be distinguished easily and reliably.
公开/授权文献
- US20080090029A1 Discrimination Medium And Discrimination Method Therefor 公开/授权日:2008-04-17
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