Anti-reflective film, polarizing plate, and display apparatus

1. An anti-reflective film comprising: a hard coating layer; and

a low refractive index layer containing a binder resin, and two or more groups of hollow inorganic particles having different particle diameters measured by dynamic light scattering (DLS),

wherein the two or more groups of hollow inorganic particles having different particle diameters include a first group of hollow inorganic particles having a particle diameter of 40 nm to 60 nm and a second group of hollow inorganic particles having a particle diameter of 65 nm to 100 nm, and

wherein a weight ratio between the first group of the hollow inorganic particles having a particle diameter of 40 nm to 60 nm and the second group of the hollow inorganic particles having a particle diameter of 65 nm to 100 nm is 7:3 to 3:7.

2. The anti-reflective film of claim 1 , wherein a particle diameter difference between the particle diameter of the first group of the hollow inorganic particles having a particle diameter of 40 nm to 60 nm and the particle diameter of the second group of the hollow inorganic particles having a particle diameter of 65 nm to 100 nm is 5 nm to 60 nm.

3. The anti-reflective film of claim 1 , wherein the low refractive index layer comprises the two or more groups of the hollow inorganic particles having different particle diameters in an amount of 30 to 500 parts by weight based on 100 parts by weight of the binder resin.

4. The anti-reflective film of claim 1 , wherein the binder resin includes a crosslinked polymer of a photopolymerizable compound; and a fluorine-based compound containing a photoreactive functional group.

5. The anti-reflective film of claim 1 , wherein the low refractive index layer has a refractive index of 1.2 to 1.55.

6. The anti-reflective film of claim 1 , wherein the hard coating layer includes a binder resin containing a photocurable resin; and organic or inorganic fine particles dispersed in the binder resin.

7. The anti-reflective film of claim 1 , wherein the anti-reflective film has an average reflectance of less than 3% in a wavelength region of 380 nm to 780 nm.

8. The anti-reflective film of claim 1 , further comprising a light-transmissive substrate having retardation (Rth) in a thickness direction of at least 3000 nm as measured at a wavelength of 400 nm to 800 nm.

9. A polarizing plate comprising the anti-reflective film of claim 1 .

10. A display apparatus comprising the anti-reflective film of claim 1 .

11. The anti-reflective film of claim 1 , wherein the two or more groups of the hollow inorganic particles include at least one reactive functional group on a surface thereof, the reactive functional group being at least one group selected from a (meth)acrylate group, an epoxide group, a vinyl group, and a thiol group.

12. The anti-reflective film of claim 1 , wherein the two or more groups of the hollow inorganic particles include a fluorine-based compound.

13. The anti-reflective film of claim 1 , wherein the two or more groups of the hollow inorganic particles include hollow silica particles.

14. A method of preparing the anti-reflective film of claim 1 , comprising

providing a hard coating layer,

coating on the hard coating layer a photopolymerizable coating composition including two or more groups of hollow inorganic particles having different particle diameters, and

photo-polymerizing the coated hard coating layer,

wherein the two or more groups of hollow inorganic particles having different particle diameters include a first group of hollow inorganic particles having a particle diameter of 40 nm to 60 nm and a second group of hollow inorganic particles having a particle diameter of 65 nm to 100 nm.