Color correction filter for white organic electroluminescent light source, and organic electroluminescent display device

Patent metadata

Field	Value
Publication number	US-2021005673-A1
Application number	US-202017025079-A
Country	US
Kind code	A1
Filing date	Sep 18, 2020
Priority date	Mar 29, 2018
Publication date	Jan 7, 2021
Grant date	—

Abstract

There are provided a color correction filter for a white organic electroluminescent light source including a resin and 0.1 part by mass or more of a coloring agent 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, and having a moisture content of 0.5% by mass or less, and an organic EL display device having this filter.

First claim

What is claimed is:

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 coloring agent 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 filter has a moisture content of 0.5% by mass or less.

2 . The color correction filter for a white organic electroluminescent light source according to claim 1 ,
wherein the coloring agent is a squarine-based coloring agent represented by Formula (1),

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.

3 . The color correction filter for a white organic electroluminescent light source according to claim 1 ,
wherein the color correction filter for a white organic electroluminescent light source contains an electron donating type quencher, and an energy level of a HOMO of the coloring agent and an energy level of a HOMO of the electron donating type quencher satisfy Relational Expression [A-1] below,
E Hq −E Hd ≤0.40 eV,  Relational Expression [A-1]:

where E Hd and E Hq respectively represent the following values, E Hd : energy level of HOMO of coloring agent, and E Hq : energy level of HOMO of electron donating type quencher.

4 . The color correction filter for a white organic electroluminescent light source according to claim 1 ,
wherein the color correction filter for a white organic electroluminescent light source contains an electron accepting type quencher, and an energy level of a LUMO of the coloring agent and an energy level of a LUMO of the electron accepting type quencher satisfy Relational Expression [B-1] below,
E Ld −E Lq ≤0 eV,  Relational Expression [B-1]:

where E Ld and E Lq respectively represent the following values, E Ld : energy level of LUMO of coloring agent, and E Lq : energy level of LUMO of electron accepting type quencher.

5 . The color correction filter for a white organic electroluminescent light source according to claim 1 ,
wherein the resin satisfies Relational Expression [C] below,
0.80≤ fd≤ 0.95  Relational Expression [C]:

where the fd value is defined by Relational Expression I below,
fd=δd /(δ d+δp+δh ),  Relational Expression I:

in Relational Expression I, δd, δp, and δh respectively indicate a term corresponding to a London dispersion force, a term corresponding to a dipole-dipole force, and a term corresponding to a hydrogen bonding force with respect to a solubility parameter St calculated by a Hoy method.

6 . The color correction filter for a white organic electroluminescent light source according to claim 1 ,
wherein the resin contains a polystyrene resin.

7 . The color correction filter for a white organic electroluminescent light source according to claim 1 ,
wherein the resin contains a cyclic polyolefin resin.

8 . An organic electroluminescent display device comprising:
the color correction filter for a white organic electroluminescent light source according to claim 1 .

Assignees

• Fujifilm Corp

Inventors

• Naito Yu
• Fukagawa Nobutaka
• Sasaki Daisuke
• Kuwahara Hiroki

Classifications

• Y02B20/00

  Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps · CPC title

• H10K2101/40

  Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers · CPC title

• C08L25/06

  Polystyrene · CPC title

• C08K5/0041

  Optical brightening agents, organic pigments · CPC title

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title