US 11,860,390 B2
Wavelength selective absorption filter, organic electroluminescent display device, and liquid crystal display device
Nobutaka Fukagawa, Kanagawa (JP); Daisuke Sasaki, Kanagawa (JP); Yoshihiro Jimbo, Kanagawa (JP); and Hidetomo Furuyama, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jul. 19, 2022, as Appl. No. 17/868,171.
Application 17/868,171 is a continuation of application No. PCT/JP2021/006887, filed on Feb. 24, 2021.
Claims priority of application No. 2020-029393 (JP), filed on Feb. 25, 2020.
Prior Publication US 2022/0381960 A1, Dec. 1, 2022
Int. Cl. G02B 5/22 (2006.01); G02F 1/1335 (2006.01); H10K 59/38 (2023.01)
CPC G02B 5/223 (2013.01) [G02F 1/133509 (2013.01); G02F 1/133514 (2013.01); G02F 1/133528 (2013.01); G02F 1/133533 (2013.01); H10K 59/38 (2023.02); C09K 2323/031 (2020.08)] 6 Claims
OG exemplary drawing
 
1. A wavelength selective absorption filter comprising
a resin; and
the following dye A and dye D, each of which has a main absorption wavelength band in a different wavelength range,
wherein an absorbance Ab (λ) at a wavelength λ nm of the wavelength selective absorption filter satisfies a relationship of the following Expression (I),
the dye A: a dye having a main absorption wavelength band in the wavelength selective absorption filter at a wavelength of 400 to 430 nm,
the dye D: a dye having a main absorption wavelength band in the wavelength selective absorption filter at a wavelength of 640 to 730 nm, and
0.05≤Ab(450)/Ab(430)<1.00.  Relational Expression (I)