发明授权
- 专利标题: Identification medium, identification method, and identification apparatus
- 专利标题(中): 识别介质,识别方法和识别装置
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申请号: US12312653申请日: 2007-10-18
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公开(公告)号: US08322753B2公开(公告)日: 2012-12-04
- 发明人: Hidekazu Hoshino , Itsuo Takeuchi , Tokio Sakauchi , Suzushi Nishimura , Gorou Suzaki
- 申请人: Hidekazu Hoshino , Itsuo Takeuchi , Tokio Sakauchi , Suzushi Nishimura , Gorou Suzaki
- 申请人地址: JP Yokohama JP Tokyo
- 专利权人: NHK Spring Co., Ltd.,Nippon Oil Corporation
- 当前专利权人: NHK Spring Co., Ltd.,Nippon Oil Corporation
- 当前专利权人地址: JP Yokohama JP Tokyo
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2006-315743 20061122
- 国际申请: PCT/JP2007/070325 WO 20071018
- 国际公布: WO2008/062620 WO 20080529
- 主分类号: B42D15/00
- IPC分类号: B42D15/00
摘要:
An identification medium is to be observed via a linearly polarizing filter and includes a first liquid crystal layer that changes the wavelength of light according to the rotational angle of the linearly polarizing filter, a cholesteric liquid crystal layer, and a light absorbing layer that is provided below the cholesteric liquid crystal layer.
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