Invention Grant
- Patent Title: Identification medium and identification method therefor
- Patent Title (中): 识别介质及其识别方法
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Application No.: US13509916Application Date: 2010-11-12
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Publication No.: US08970953B2Publication Date: 2015-03-03
- Inventor: Hidekazu Hoshino , Itsuo Takeuchi , Tokio Sakauchi , Seiya Shibuya , Tohru Ida
- Applicant: Hidekazu Hoshino , Itsuo Takeuchi , Tokio Sakauchi , Seiya Shibuya , Tohru Ida
- Applicant Address: JP Yokohama-shi
- Assignee: NHK Spring Co., Ltd.
- Current Assignee: NHK Spring Co., Ltd.
- Current Assignee Address: JP Yokohama-shi
- Agency: Oliff PLC
- Priority: JP2009-270012 20091127
- International Application: PCT/JP2010/070212 WO 20101112
- International Announcement: WO2011/065242 WO 20110603
- Main IPC: G03H1/00
- IPC: G03H1/00 ; G02B5/30 ; G02B27/28 ; G06K9/74 ; G03H1/02 ; B42D25/29 ; B42D25/328 ; B42D25/391

Abstract:
An identification medium is provided in which latent image having plural colors can be observed even when the identification medium is spaced away from a polarization filter. A cholesteric liquid crystal layer is provided as a specific polarization light reflection layer which reflects light having a specific polarized condition. An optical anisotropic layer having an optical anisotropy is provided at an upper position overlapping with the specific polarization light reflection layer. An image A fanned by an area having an optical anisotropy different from that of surroundings is formed at the optical anisotropic layer. When the identification medium is directly viewed, the influence of the optical anisotropy cannot be seen. When the identification medium is observed via a circular polarization filter, the image can be seen to have a specific color by the influence of the optical anisotropy.
Public/Granted literature
- US20120236292A1 IDENTIFICATION MEDIUM AND IDENTIFICATION METHOD THEREFOR Public/Granted day:2012-09-20
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