INFORMATION PRESENTING DEVICE

摘要

FIELD: information technology. ^ SUBSTANCE: information presenting device (16) comprises a first information layer (18) having a first information presentation structure (20) of photochromatic material changing appearance when exposed to light (28) of a specific wavelength, a second information layer (22) having a second information presentation structure (24), and a first light source (26) illuminating the second information layer for presenting the second information presentation structure, wherein the first information layer is of a material which is transparent for light emanating at least from the first light source when the first layer is not exposed to light of said specific wavelength. ^ EFFECT: information presenting device in which a light source is used to visually present information which can also show information if there is a large amount of external light at a specific wavelength. ^ 11 cl, 9 dwg