Abstract: There is provided an ink composition that can form a color filter pixel unit with high external quantum efficiency. An ink composition containing light-emitting nanocrystal particles, light-diffusing particles, and at least two monomers with an ethylenically unsaturated group, wherein the at least two monomers include two monomers with Hansen solubility parameters ?d, ?p, and ?h that satisfy the following conditions: 16.0 MPa0.5??d<18.0 MPa0.5; 2.5 MPa0.5??p<5.5 MPa0.5; 2.5 MPa0.5??h<8.0 MPa0.5.

Abstract: An ink composition that contains light-emitting nanocrystalline particles, a photopolymerizable component containing at least one photopolymerizable compound and having a Hansen solubility parameter ?p of 3.0 MPa0.5 or more, and a phosphite compound with a partial structure represented by the following formula (1). [In the formula (1), X1 to X3 independently denote an oxygen atom or a sulfur atom, R1 denotes an alkyl group, and * denotes a bonding arm.

Abstract: There is provided an ink composition that can form a color filter pixel unit with high external quantum efficiency. An ink composition containing light-emitting nanocrystal particles, light-diffusing particles, and at least two monomers with an ethylenically unsaturated group, wherein the at least two monomers include two monomers with Hansen solubility parameters ?d, ?p, and ?h that satisfy the following conditions: 16.0 MPa0.5??d<18.0 MPa0.5; 2.5 MPa0.5??p<5.5 MPa0.5; 2.5 MPa0.5??h<8.0 MPa0.

Abstract: A method for manufacturing an aqueous black pigment dispersion, including the steps of subjecting a mixture containing carbon black and an aqueous medium to media-less dispersion and adding a resin having anionic groups and a basic compound after the dispersion, wherein the carbon black has a carboxylic acid group on the surface such that the value produced by dividing the amount of carboxylic acid group present on the surface by BET value is 0.8 to 5.5 (?mol/m2) and the resin having anionic groups is an urethane resin that satisfies (weight average molecular weight/acid value)<1,400 or a styrene acrylic resin that satisfies (weight average molecular weight/acid value)<120.

Abstract: A method for manufacturing an aqueous black pigment dispersion, including the steps of subjecting a mixture containing carbon black and an aqueous medium to media-less dispersion and adding a resin having anionic groups and a basic compound after the dispersion, wherein the carbon black has a carboxylic acid group on the surface such that the value produced by dividing the amount of carboxylic acid group present on the surface by BET value is 0.8 to 5.5 (?mol/m2) and the resin having anionic groups is an urethane resin that satisfies (weight average molecular weight/acid value)<1,400 or a styrene acrylic resin that satisfies (weight average molecular weight/acid value)<120.