A color conversion filter substrate includes a transparent support substrate, one or more types of color conversion layers with a thickness more than 5 μm formed on the support substrate in a desired pattern, and a protective layer formed of a transparent material for covering the support substrate...http://www.google.es/patents/US7135816?utm_source=gb-gplus-sharePatente US7135816 - Color conversion filter and color conversion color display having the same
Color conversion filter and color conversion color display having the same