TWI777951B

Provided is a resin composition for forming a high refractive index cured film, which contains (a) a fluorene compound represented by formula [1] and (b) an aromatic ring-containing polymer that contains a repeating unit derived from a (meth)acrylic acid and/or an aliphatic (meth)acrylate compound (excluding those having a silane structure in a side chain) and a repeating unit derived from an aromatic ring-containing compound having a polymerizable double bond. (In the formula, each of R1 and R2 independently represents a hydrogen atom or a methyl group; each of L1 and L2 independently represents an optionally substituted phenylene group or an optionally substituted naphthalenediyl group; each of L3 and L4 independently represents an alkylene group having 1-6 carbon atoms; and m and n represent integers satisfying 0 ≤ m ≤ 40, 0 ≤ n ≤ 40 and 0 ≤ m + n ≤ 40.)