Patent ID: 8147971

Claim:
A self-cleaning system, comprising: a first translucent substrate; a light-emitting device; a photo-catalytic layer applied to a surface of the first translucent substrate for providing a self-cleaning surface, the photo-catalytic layer being arranged for producing the self-cleaning effect when illuminated with light of a predefined wavelength range, the first translucent substrate being translucent for at least a sub-range of the predefined wavelength range to activate said photo-catalytic layer, said sub-range producing said self-cleaning effect, and the light-emitting device being arranged for illuminating the photo-catalytic layer via the translucent substrate, an emission spectrum emitted by the light-emitting device comprising light within the sub-range; and a second translucent substrate for reflecting at least part of the light within the sub-range emitted by the light-emitting device towards said photo-catalytic layer.