Abstract: An imaging device includes a light source, an image carrier and an effervescence generator that includes a liquid-containing unit and propagation unit for gas and for liquid contained in the liquid-containing unit. The effervescence generator and the light source are arranged at a first side of the image carrier, and light is projected through at least a part of the effervescence generator and through the image carrier in order to obtain a combined image at the second side situated opposite the first side of the image carrier. The liquid is purified water to which a surface tension-reducing agent has been added.

Abstract: A display device with a light source and an effervescent effect generator. The effervescent effect generator has a housing with a light transmissive portion that is filled with a liquid and a gas and is sealed closed. A pump and hose form bubbles of the gas that is sealed in the housing in the liquid in the housing so that the liquid appears to be effervescent when viewed at the light transmissive portion.