Optical film and electroluminescence display device
AssigneeFUJIFILM Corporation
InventorNaoya Nishimura
Life of this patent
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Abstract
Provided is an optical film and an electroluminescence display device that suppress a decrease in transmittance of a front surface and suppress a change in tint in an oblique direction with respect to the front surface, in a case of being used in a micro LED. The optical film includes a light absorption anisotropic layer containing a dichroic coloring agent compound, in which the light absorption anisotropic layer has an absorption axis in a normal direction of the film and has an alignment degree of 0.7 or greater at 530 nm, and in a case where transmittances at 460 nm, 530 nm, and 630 nm in a direction of 45° with respect to the normal direction of the film are respectively defined as Tb, Tg, and Tr, relationships of Expressions 0.1≤Tb/Tr≤0.5 (1) and 0.2≤Tg/Tr≤0.6 (2) are satisfied.
Claims20
An optical film comprising:
- a light absorption anisotropic layer containing a dichroic coloring agent compound,
- wherein the light absorption anisotropic layer has an absorption axis in a normal direction of the film and has an alignment degree of 0.7 or greater at 530 nm, and
- in a case where transmittances at 460 nm, 530 nm, and 630 nm in a direction of 45° with respect to the normal direction of the film are respectively defined as Tb, Tg, and Tr, relationships of Expressions (1) and (2) are satisfied,
- 0.1≤Tb/Tr≤0.5 (1)
- 0.2≤Tg/Tr≤0.6 (2).
Dependencies are inferred from the claim text.