Wavelength selective absorption filter, polarizing plate, organic electroluminescent display device, and liquid crystal display device
Provided are a wavelength selective absorption filter containing a resin and a dye A, which has a main absorption wavelength band in the wavelength selective absorption filter at a wavelength of 400 to 450 nm, and a dye C, which has a main absorption wavelength band in the wavelength selective absorption filter at a wavelength of 560 to 600 nm, each of which has a main absorption wavelength band in a different wavelength range, as well as a polarizing plate and an organic electroluminescent display device or liquid crystal display device, which include the wavelength selective absorption filter. However, the dye A and the dye C do not have fluorescence.
1 . A wavelength selective absorption filter comprising:
a resin; and
a dye,
wherein the dye contained in the wavelength selective absorption filter consists of a dye A and a dye C,
wherein the dye A and the dye C each has a main absorption wavelength band in a different wavelength range,
wherein the dye A and the dye C do not have fluorescence,
the dye A: a dye having a main absorption wavelength band in the wavelength selective absorption filter at a wavelength of 400 to 450 nm,
the dye C: a dye having a main absorption wavelength band in the wavelength selective absorption filter at a wavelength of 560 to 600 nm;
wherein the dye A is a coloring agent represented by General Formula (A1),
wherein, in the General Formula (A1), R 1 and R 2 each independently represent an alkyl group or an aryl group, R 3 , R 5 and R 6 each independently represent a hydrogen atom or a substituent, R 4 represents a hydrogen atom, an alkyl group or an aryl group, and R 5 and R 6 may be bonded to each other to form a 6-membered ring; and
wherein the alkyl group of R 4 is an unsubstituted alkyl group, or a substituted alkyl group whose substituent is an aryl group, a heterocyclic group, a carboxy group, a hydroxy group, an alkoxy group, an aryloxy group, an alkylamino group, an alkylcarbonylamino group, a cyano group, an acyl group, or a monovalent group in which at least the two thereof are linked to each other.
2 . A polarizing plate comprising the wavelength selective absorption filter according to claim 1 .
3 . An organic electroluminescent display device or a liquid crystal display device, comprising the wavelength selective absorption filter according to claim 1 .