Patent ID: 9452631
Filing Date: 2016-09-27
CPC Classification: B41M,B42D,G07D

Claim Text:
1. A light-emitting medium including a light-emitting image on a substrate wherein: the light-emitting image includes a first area containing a first fluorescent material, a second area containing a second fluorescent material, and a protective layer formed on the first fluorescent material of the first area and the second fluorescent material of the second area; at least a part of the second area is adjacent to the first area; the first fluorescent material and the second fluorescent material are configured to emit light of colors that are a same color when invisible light within a first wavelength range is independently irradiated and when invisible light within a second wavelength range is independently irradiated; and the first fluorescent material and the second fluorescent material are configured to emit light of colors that arc different colors from each other when the invisible light within the first wavelength range and the invisible light within the second wavelength range are simultaneously irradiated.