RED PIGMENT DISPERSION FOR COLOR FILTER AND PRODUCTION METHOD OF THE DISPERSION, RED PHOTOSENSITIVE RESIN COMPOSITION FOR COLOR FILTER AND PRODUCTION METHOD OF THE COMPOSITION, COLOR FILTER, AND LIQUID CRYSTAL DISPLAY DEVICE AND ORGANIC LIGHT-EMITTING DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a red pigment dispersion for a color filter, the dispersion having excellent dispersibility and dispersion stability and meeting requirements for high luminance and a high contrast, and to provide a red photosensitive resin composition for a color filter, from which a color layer having high luminance and a high contrast can be formed.SOLUTION: The red pigment dispersion for a color filter comprises a diketopyrrolopyrrole red pigment, a sulfonated derivative of a yellow pigment, a pigment dispersant and a solvent. The pigment dispersant comprises a grafted copolymer containing, as copolymer components, a monomer having an ethylenically unsaturated double bond and an amino group, and a macromonomer having a polymer chain and an ethylenically unsaturated double bond at a terminal of the chain, in which at least a part of an amino group derived from the monomer having an ethylenically unsaturated double bond and an amino group forms a salt together with an organic acid compound. The red photosensitive resin composition for a color filter contains the above pigment dispersion.