ILLUMINATED SIGN USING QUANTUM DOTS

摘要

PROBLEM TO BE SOLVED: To provide signs comprising photoluminescent quantum dots (QDs).;SOLUTION: An illuminated sign has a primary light source 101 in spaced relation to a transparent or translucent substrate 103. The substrate has 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.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT