| 摘要 |
PROBLEM TO BE SOLVED: To obtain a red color resist ink which, when used for color filters for liquid crystal displays, gives a high level of brightness and chroma. SOLUTION: This red color resist ink, prepared by dispersing a red pigment in a photosensitive resin composition, contains diketopyrrolopyrrole as the red pigment and a diketopyrrolopyrrolesulfonic acid derivative as a pigment derivative as essential ingredients, both dispersed therein, provided diketopyrrolopyrrole contained is pulverized to 100 nm or lower in advance, The ink is prepared by compounding a photosensitve resin composition with a red pigment dispersion composition obtained by dispersing the red pigment, the pigment derivative, and a cationic polymeric dispersant in an organic solvent, The color filter obtained has red pixels containing the red pigment and the pigment derivative as essential ingredients. |
