Optical film, optical laminate, and image display device
AssigneeFUJIFILM Corporation
InventorsNaoya Nishimura, Takashi Katou, Shuntaro Ibuki
Life of this patent
Estimating the term…
Abstract
Provided is an optical film capable of neutralizing both the tint as viewed in a transmittance central axis direction and the tint as viewed in a direction inclined from a transmittance central axis, and an optical laminate and an image display device formed of this optical film. The optical film includes a light absorption anisotropic layer in which an angle θ between a transmittance central axis and a normal direction of a layer surface is in a range of 0° to 45°, and a tint adjusting layer containing at least one organic coloring agent compound.
Claims19
An optical film comprising:
- a light absorption anisotropic layer in which an angle θ between a transmittance central axis and a normal direction of a layer surface is in a range of 0° to 45°;
- and
- a tint adjusting layer containing at least one organic coloring agent compound,
- wherein the light absorption anisotropic layer contains a liquid crystal compound and at least one dichroic coloring agent compound,
- the transmittance central axis is the direction in which the highest transmittance is exhibited in a case where the transmittance is measured by changing the inclination angle and the inclination direction with respect to the normal direction of the surface of the light absorption anisotropic layer, and
- Expression (7) is satisfied,
- 0.005
- ≤
- (
- c
-
- (
- C
- )
- ×
- d
-
- (
- C
- )
- )
- /
- (
- c
-
- (
- p
- )
- ×
- d
-
- (
- P
- )
- )
- ≤
- 0
- .
- 0
-
- 6
- Expression
-
- (
- 7
- )
- in Expression (7), c(C) represents a mass ratio of the organic coloring agent compound in the tint adjusting layer with respect to a total mass of the tint adjusting layer,
- in Expression (7), d(C) represents a film thickness (μm) of the tint adjusting layer,
- in Expression (7), c (P) represents a mass ratio of the dichroic coloring agent compound in the light absorption anisotropic layer with respect to a total mass of the light absorption anisotropic layer, and
- in Expression (7), d (P) represents a film thickness (μm) of the light absorption anisotropic layer.
An optical film comprising:
- a light absorption anisotropic layer in which an angle θ between a transmittance central axis and a normal direction of a layer surface is in a range of 0° to 45°;
- and
- a tint adjusting layer containing at least one organic coloring agent compound,
- wherein the light absorption anisotropic layer contains a liquid crystal compound and at least one dichroic coloring agent compound,
- the transmittance central axis is the direction in which the highest transmittance is exhibited in a case where the transmittance is measured by changing the inclination angle and the inclination direction with respect to the normal direction of the surface of the light absorption anisotropic layer, and
- a transmittance of light having a wavelength of 550 nm in a direction along the transmittance central axis is 65% or greater.
Dependencies are inferred from the claim text.