Patent ID: 11950480
Assignee: FUJIFILM CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 0:
1. A color correction filter for a white organic electroluminescent light source, the color correction filter comprising:
a resin; and
0.1 parts by mass or more of a squarine-based coloring agent represented by Formula (1) and having an absorption maximum wavelength in a range of 560 to 620 nm or 460 to 520 nm with respect to 100 parts by mass of the resin,
wherein the coloring agent is in a form of a coloring agent containing a polarization degree improver having a coloring agent portion and a polarization degree improver portion;
wherein the polarization degree improver portion is selected from an electron donating type quencher portion or an electron accepting type quencher portion;
wherein an energy level of a HOMO of the coloring agent portion and an energy level of a HOMO of the electron donating type quencher portion satisfy Relational Expression [A-1] below,

EHq−EHd≤0.40 eV,  Relational Expression [A-1]:

where EHd and EHq respectively represent the following values,
EHd: energy level of HOMO of coloring agent portion, and
EHq: energy level of HOMO of electron donating type quencher portion;
wherein an energy level of a LUMO of the coloring agent portion and an energy level of a LUMO of the electron accepting type quencher portion satisfy Relational Expression [B-1] below,

ELd−ELq≤0 eV,  Relational Expression [B-1]:

where ELd and ELq respectively represent the following values,
ELd: energy level of LUMO of coloring agent portion, and
ELq: energy level of LUMO of electron accepting type quencher portion; and
wherein the filter has a moisture content of 0.5% by mass or less,, in Formula (1), A and B each independently represent an aryl group which may have a substituent, a heterocyclic group which may have a substituent, or —CH=G, and G represents a heterocyclic group which may have a substituent.