Medium for identifying matter to be identified and method for production thereof
AssigneeNHK Spring Co., Ltd.
InventorsHidekazu Hoshino, Itsuo Takeuchi, Seiya Shibuya
Life of this patent
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Abstract
In an identification medium for identifying an authenticity of an object either visually or optically by using an identification device, high polymer cholesteric liquid crystal is applied onto the object, onto a sticker adapted to be affixed to the object or onto a base for hot stamping onto the object, and the high polymer cholesteric liquid crystal is patterned, and/or a graphic representation layer such as a figure and letter is formed under or over the high polymer cholesteric liquid crystal to enhance the aesthetic quality of the identification medium or the object, and improve the capability to identify and prevent forgery.
Claims8
An identification medium for identifying an authenticity of an object either visually or optically by using an identification device, characterized by that:
- the identification medium comprises high polymer cholesteric liquid crystal which is patterned and/or is provided with a graphic representation layer such as a figure and letter underlying or overlying the high polymer cholesteric liquid crystal, the high polymer cholestric liquid crystal being partly modified by laser so as to change a pitch of adjacent layers of the cholesteric liquid crystal and change a color of reflected light according to a prescribed pattern.
A method for making an identification medium for identifying an authenticity of an object either visually or optically by using an identification device, characterized by the steps of:
- applying high polymer cholesteric liquid crystal onto the object, onto a sticker adapted to be affixed to the object or onto a base for hot stamping onto the object;
- and
- patterning the high polymer cholesteric liquid crystal, and/or forming a graphic representation layer such as a figure and letter under or aver the high polymer cholesteric liquid crystal;
- and
- partly modifying the high polymer cholesteric liquid crystal by laser so as to change a pitch of adjacent layers of the cholesteric liquid crystal and change color of reflected light according to a prescribed pattern.
Dependencies are inferred from the claim text.