Color filter ink set, color filter, image display device, and electronic device
A color filter ink set is adapted to be used to manufacture a color filter by an inkjet method. The color filter ink set includes a plurality of inks with each of the inks including a colorant and a liquid medium that disperses and/or dissolves the colorant. The inks include a green ink having C. I. Pigment Green 58 and a substance represented by a prescribed chemical formula. A viscosity at 25° C. of the liquid medium of the green ink is lower than a viscosity at 25° C. of the liquid medium of the ink other than the green ink. A difference (η max −η min ) between a viscosity (η max (mPa·s)) of the ink having the highest viscosity among the inks at 25° C. and a viscosity (η min (mPa·s)) of the ink having the lowest viscosity among the inks at 25° C. is 1.0 mPa·s or less.
1. A color filter ink set adapted to be used to manufacture a color filter by an inkjet method, the color filter ink set comprising:
a plurality of inks with each of the inks including a colorant and a liquid medium that disperses and/or dissolves the colorant,
the inks including a green ink having C. I. Pigment Green 58 and a substance represented by a chemical formula (1) below,
wherein, in the chemical formula (1), a value n is an integer from 1 to 5, and X 1 through X 8 represents each independently a hydrogen atom or a halogen atom,
a viscosity at 25° C. of the liquid medium of the green ink being lower than a viscosity at 25° C. of the liquid medium of the ink other than the green ink,
a difference (η max −η min ) between a viscosity (η max (mPa·s)) of the ink having the highest viscosity among the inks at 25° C. and a viscosity (η min (mPa·s)) of the ink having the lowest viscosity among the inks at 25° C. being 1.0 mPa·s or less,
the green ink including an acid-value dispersing agent having a predetermined acid value in a range from 5 to 370 KOH mg/g and an amine-value dispersing agent having a predetermined amine value in a range from 5 to 200 KOH mg/g, with the acid-value dispersing agent and the amine-value dispersing agent being arranged to satisfy a relationship 0.1≦C A /C B ≦1, wherein a value C A (wt %) is a content ratio of the acid-value dispersing agent in the green ink, and a value C B (wt %) is a content ratio of the amine-value dispersing agent in the green ink; and wherein at least one of the inks further includes a curable resin material having a first polymer containing at least a first epoxy-containing vinyl monomer as a monomer component.
2. The color filter ink set according to claim 1 , wherein
the inks further include a red ink having one or more substances selected from the group consisting of C. I. Pigment Red 177, C. I. Pigment Red 254, a pigment derivative represented by a chemical formula (2) below, and a pigment derivative represented by a chemical formula (3) below,
wherein, in the chemical formula (2), a value n is an integer from 1 to 4,
wherein, in the chemical formula (3), a value n is an integer from 1 to 4.
3. The color filter ink set according to claim 2 , wherein
a sum of a content ratio of C. I. Pigment Red 177, a content ratio of C. I. Pigment Red 254, a content ratio of the pigment derivative represented by the chemical formula (2), and a content ratio of the pigment derivative represented by the chemical formula (3) in the red ink is 3.0 to 10 wt %.
4. The color filter ink set according to claim 1 , wherein
the inks further include a blue ink having C. I. Pigment Blue 15:6.
5. The color filter ink set according to claim 4 , wherein
a content ratio of C. I. Pigment Blue 15:6 in the blue ink is 3.0 to 10 wt %.
6. The color filter ink set according to claim 1 , wherein
a content ratio of C. I. Pigment Green 58 in the green ink is 6.0 to 15 wt %.
7. The color filter ink set according to claim 1 , wherein
the inks are arranged to satisfy a relationship 0.02≦C C /C G58 ≦0.32, wherein a value C G58 (wt %) indicates a content ratio of C. I. Pigment Green 58 in the green ink and a value C C (wt %) indicates a content ratio of the substance represented by the chemical formula (1) in the green ink.
8. The color filter ink set according to claim 1 , wherein
the first polymer is a copolymer having the first epoxy-containing vinyl monomer and a second vinyl monomer as monomer components, the second vinyl monomer having an isocyanate group or a block isocyanate group in which an isocyanate group is protected by a protective group.
9. The color filter ink set according to claim 1 , wherein
the curable resin material further includes a second polymer containing at least an alkoxysilyl-containing vinyl monomer represented by a chemical formula (4) below as a monomer component,
wherein, in the chemical formula (4), R 1 represents a hydrogen atom or a C 1-7 alkyl group, E represents a single bond hydrocarbon group or a bivalent hydrocarbon group, R 2 represents a C 1-6 alkyl group or a C 1-6 alkoxyl group, R 3 represents a C 1-6 alkyl group or a C 1-6 alkoxyl group, R 4 represents a C 1-6 alkyl group, a value x is 0 or 1, and a value y is an integer from 1 to 10.
10. The color filter ink set according to claim 1 , wherein
the acid-value dispersing agent and the amine-value dispersing agent are arranged to satisfy a relationship 0.01≦(AV×C A )/(BV×C B )≦1.9, wherein a value AV (KOH mg/g) is the predetermined acid value of the acid-value dispersing agent, and a value BV (KOH mg/g) is the predetermined amine value of the amine-value dispersing agent.
11. A color filter manufactured using the color filter ink set according to claim 1 .
12. An image display device having the color filter according to claim 11 .
13. The image display device according to claim 12 , wherein the image display device is a liquid crystal panel.
14. An electronic device having the image display device according to claim 12 .