| 摘要 |
PROBLEM TO BE SOLVED: To provide a hologram sheet using a hologram, configured to reproduce a hologram reproduction image, which is invisible normally, with a wavelength different from that of an indoor illumination light source, by applying a voltage, in order to enhance authenticity. ! SOLUTION: An electroluminescence element layer is formed on a hologram formation layer. The electroluminescence element layer is formed in the shape of hologram relief. Only when a predetermined voltage is applied, a hologram of a predetermined visible wavelength appears in the space. The hologram can be visually authenticated, thereby enhancing forgery prevention effect. ! COPYRIGHT: (C)2015,JPO&INPIT |
