Patent ID: 8187726

Claim:
A nanoparticle-resin composite material having a transparent characteristic and a refractive index of at least 1.55 in the visible light region, the material comprising: inorganic nanoparticles dispersed in a polymer having a siloxane bond, the inorganic nanoparticles being coated with an organic compound; wherein the organic compound is at least one compound selected from the group consisting of carboxylic acids, phosphinic acid, phosphonic acid, sulfinic acid, sulfonic acid, and thiols; wherein the organic compound includes an aryl group or an aryloxy group; and wherein the polymer is selected from the group consisting of a methylphenyl polysiloxane based polymer, a methylphenyl hydrogen polysiloxane based polymer, and a mixture of the methylphenyl polysiloxane based polymer and the methylphenyl hydrogen polysiloxane based polymer, wherein parts of the side chains and/or terminals of the methylphenyl polysiloxane based polymer and the methylphenyl hydrogen polysiloxane based polymer are substituted by epoxy groups, carboxyl groups, carbinol groups, methacryl groups, polyether groups, or vinyl groups.