Optical film, display device, and composition for forming colored layer

Patent metadata

Field	Value
Publication number	US-2023422567-A1
Application number	US-202318244895-A
Country	US
Kind code	A1
Filing date	Sep 11, 2023
Priority date	Mar 12, 2021
Publication date	Dec 28, 2023
Grant date	—

Abstract

An optical film includes a transparent substrate in which an ultraviolet shielding rate is 85% or more, and a colored layer containing a colorant. The colored layer includes one or more layers containing a first colorant material in which a maximum absorption wavelength is 470 nm or more and 530 nm or less and a half width of an absorption spectrum thereof is 15 nm or more and 45 nm or less, a second colorant material in which a maximum absorption wavelength is 560 nm or more and 620 nm or less and a half width of an absorption spectrum thereof is 15 nm or more and 55 nm or less, and a third colorant material in which a wavelength in a wavelength range of 400 nm to 780 nm at which a transmittance is lowest is in a range of 650 nm or more and 780 nm or less.

First claim

What is claimed is:

1 . An optical film, comprising:
a transparent substrate in which an ultraviolet shielding rate in accordance with JIS L 1925 is 85% or more; one or more functional layers arranged to face a first surface of the transparent substrate; and a colored layer comprising one or more layers that contain a colorant, the colored layer being arranged to face a second surface of the transparent substrate, wherein the colored layer contains
a first colorant material in which a maximum absorption wavelength is in a range of 470 nm or more and 530 nm or less and a half width of an absorption spectrum thereof is 15 nm or more and 45 nm or less,
a second colorant material in which a maximum absorption wavelength is in a range of 560 nm or more and 620 nm or less and a half width of an absorption spectrum thereof is 15 nm or more and 55 nm or less, and
a third colorant material in which in a wavelength range of 400 nm to 780 nm, a wavelength at which a transmittance is lowest is in a range of 650 nm or more and 780 nm or less, and
each of values a* and b* of a hue of the optical film that are defined by the following formulas (1) to (9) is in a range from −5 to +5 inclusive:

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Assignees

• Toppan Inc

Inventors

• Ishikawa Shinya
• Ishimaru Yoshiko
• FUTAMATA Kai

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/875

  Arrangements for extracting light from the devices · CPC title

• H10K59/32 Primary

  Stacked devices having two or more layers, each emitting at different wavelengths · CPC title

• G02B5/223 Primary

  containing organic substances, e.g. dyes, inks or pigments · CPC title