An object of the present invention is to solve the problem of losing a part of the incident light due to the irregular reflection of the incident light if a layer containing fine particles is formed by coating for the purpose of roughing when providing measures to prevent the reflection of the light...http://www.google.com/patents/US20040253413?utm_source=gb-gplus-sharePatent US20040253413 - Optical filter and organic EL display using the same
