Optical film, optical filter and display device including the same
An optical film includes a selective visible light-absorbing layer including at least one dye having a maximum absorption wavelength in a range of about 470 nm to about 510 nm, the selective visible light-absorbing layer having a maximum light transmittance of about 60% or less at the maximum absorption wavelength of the dye and a full width at half maximum of about 50 nm or less.
1. An optical film, comprising a selective visible light-absorbing layer including at least one dye having a maximum absorption wavelength in a range of about 470 nm to about 510 nm, the selective visible light-absorbing layer having a maximum light transmittance of about 60% or less at the maximum absorption wavelength of the dye and a full width at half maximum of about 50 nm or less, wherein the dye includes a cyanine dye.
2. The optical film as claimed in claim 1 , wherein the selective visible light-absorbing layer has a maximum light transmittance of 50% or less at the maximum absorption wavelength.
3. The optical film as claimed in claim 1 , wherein the dye has a maximum absorption wavelength in the range of about 485 nm to about 495 nm.
4. The optical film as claimed in claim 1 , wherein the cyanine dye includes one or more of a cyanine compound, a phthalocyanine compound, or a naphthalocyanine compound.
5. The optical film as claimed in claim 4 , wherein:
the selective visible light-absorbing layer further includes a color compensating dye, and
the color compensating dye includes one or more of an anthraquinone dye, a perinone dye, a monoazo dye, a disazo dye, or a methine dye.
6. The optical film as claimed in claim 5 , wherein the at least one color compensating dye includes a compound represented by one of Formulas 1 to 7 below:
7. The optical film as claimed in claim 5 , wherein the selective visible light-absorbing layer includes about 0.0001 to about 30 parts by weight of the color compensating dye, based on 100 parts by weight of a solid content of the selective visible light-absorbing layer.
8. The optical film as claimed in claim 1 , wherein the selective visible light-absorbing layer includes about 0.0001 to about 20 parts by weight of the dye and further includes about 10 to about 90 parts by weight of a binder resin, based on 100 parts by weight of a solid content of the selective visible light-absorbing layer.
9. The optical film as claimed in claim 8 , wherein the binder resin includes one or more of a melamine resin, a urethane resin, an epoxy resin, a polyester resin, a polyether resin, a polyimide resin, a silicone resin, or an acrylic resin.
10. The optical film as claimed in claim 1 , wherein the visible light-absorbing layer is formed on a transparent substrate.
11. The optical film as claimed in claim 10 , wherein the transparent substrate includes one or more of polyethylene terephthalate, polyethylene naphthalate, cyclic polyolefin, polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polycarbonate, acrylic resin, triacetylcellulose, polyethersulfone, or polyetherketone.
12. The optical film as claimed in claim 10 , wherein the selective visible light-absorbing layer is formed by applying a coating solution including the dye, a binder resin, and a solvent on the transparent substrate.
13. An optical filter, comprising at least one layer, wherein:
the layer includes at least one dye having a maximum absorption wavelength in a range of about 470 nm to about 510 nm,
the layer has a maximum light transmittance of about 60% or less at the maximum absorption wavelength of the dye and a full width at half maximum of about 50 nm or less, and
the dye includes a cyanine dye.
14. The optical filter as claimed in claim 13 , wherein the cyanine dye includes one or more of a cyanine compound, a phthalocyanine compound, or a naphthalocyanine compound.
15. A display device, comprising an optical filter having at least one layer, wherein:
the layer includes at least one dye having a maximum absorption wavelength in a range of about 470 nm to about 510 nm,
the layer has a maximum light transmittance of about 60% or less at the maximum absorption wavelength of the dye and a full width at half maximum of about 50 nm or less, and
the dye includes a cyanine dye.
16. The display device as claimed in claim 15 , further comprising a plasma display panel.
17. The display device as claimed in claim 16 , wherein the display device is configured to emit visible light using a discharge gas including neon