Patent ID: 7547476

Claim:
A brightness enhancing film having a microstructured optical layer comprising the reaction product of a polymerizable resin composition comprising: a) one or more first monomers selected from the group consisting of: i) a monomer comprising a major portion having the structure wherein R1 is independently hydrogen or methyl, R2 is hydrogen, Q is 0, and Z is independently —C(CH 3 ) 2 —, —CH 2 —, or —C(O)—; ii) a monomer comprising a major portion having the structure wherein R1 is independently hydrogen or methyl, R2 is hydrogen, Q is 0, Z is independently —C(CH 3 ) 2 —, —CH 2 —, or —C(O)—, and L is a linking group independently selected from linear or branched C 2 -C 8 alkyl groups wherein the carbon chain is substituted with one or more oxygen groups, one or more hydroxyl groups, or a combination thereof; and mixtures of i and ii; b) at least about 10 wt-% of surface modified colloidal inorganic nanoparticles; c) up to 35 wt-% of a reactive diluent; and d) optionally a crosslinking agent.