Illuminated signage using quantum dots

摘要

An illuminated sign has a primary light source in spaced apart relation to a transparent or translucent substrate having quantum dot phosphors printed or coated thereon. The primary light source may be a blue LED, a white LED or an LED having a significant portion of its emission in the ultraviolet region of the spectrum. The LED may be a backlight for the transparent or translucent substrate and/or an edge light, a down light or an up light.

主权项

1. An illuminated sign comprising:
an enclosure having at least one transparent or translucent surface; a light source within the enclosure configured to illuminate the transparent or translucent surface with primary light; a light diffuser located between the light source and the transparent or translucent surface; and, a plurality of quantum dots adhered to the transparent or translucent surface in a preselected pattern, said quantum dots emitting secondary light in response to excitation by the primary light, wherein the sign illumination is a blend of the primary light and the secondary light.